Layering garment

Abstract

A modular layering garment system includes a base undergarment and a separable interchangeable member. The base undergarment has a modular attachment system with an inner flap and a hingedly attached outer flap that define an insert-receiving channel. The outer flap moves between an open configuration exposing the channel, and a closed configuration enclosing the channel. The base undergarment includes at least one latching element. The interchangeable member includes a visible body portion extending from an insert portion. The insert portion is removably received within the channel and includes an engagement feature—either a corresponding latching element for direct mating, or an entry point permitting releasable engagement through the insert portion. In an assembled condition, the interchangeable member is releasably retained relative to the base undergarment by structural capture of the insert portion between the flaps alongside latching engagement, with the closed outer flap restricting channel access.

Description

PRIORITY CLAIM

[0001] This application claims the priority filing benefit of U.S. Provisional patent application Ser. No. 18 / 950,285 filed Nov. 18, 2024 for “Layering Undergarment Minimizer” of Emma Shiers, hereby incorporated by reference in its entirety as though fully set forth herein.BACKGROUND

[0002] The trend of wearing two pairs of pants has emerged as a creative and bold fashion statement, gaining traction in various subcultures and street styles. This look typically involves layering a pair of trousers over another, often with the inner pair being more fitted and the outer pair being looser or more statement-making. This style not only offers a unique aesthetic but also serves as a practical way to adapt to fluctuating temperatures, providing warmth and versatility.

[0003] Fashion influencers and celebrities alike have played a significant role in popularizing this trend, showcasing it on social media platforms and at high-profile events. The dual-pant or layered undergarment look allows for a mix of textures, colors, and patterns, encouraging experimentation and individual expression. Designers are increasingly incorporating this layered approach into their collections, further legitimizing it within the fashion industry and encouraging consumers to embrace unconventional silhouettes.

[0004] Moreover, the trend aligns with the broader movement toward sustainability in fashion, as it encourages consumers to repurpose existing garments instead of purchasing new ones. By layering, individuals can create fresh looks from items already in their wardrobe, promoting creativity while reducing waste. This practical aspect has resonated with environmentally conscious shoppers looking to make thoughtful fashion choices.

[0005] The trend, however, is not without downsides. For example, wearing more than one pair of pants can be bulky and uncomfortable, and in warmer temperatures or indoors, can feel too hot.BRIEF DESCRIPTION OF THE DRAWINGS

[0006] FIGS. 1A-D are flat and worn views of the hero embodiments of the lower base undergarment 2 and the interchangeable waistband member 1 in an assembled condition.

[0007] FIGS. 2-7 are front, back, and side flat views of the hero embodiment of the lower base undergarment 2 configured as a boyshort, shown in both closed and open configurations.

[0008] FIGS. 8-11 are flat and transparent angle views of the hero embodiment of the interchangeable waistband member 1 configured as a sweatpant waistband.

[0009] FIGS. 12A-B are transparent angle views showing the hero embodiment of the interchangeable waistband member 1 aligned for attachment to the lower base undergarment 2.

[0010] FIGS. 13A-J are cross-sectional views illustrating representative latching configuration implementations.

[0011] FIGS. 14A-I illustrate a representative attachment sequence of the lower base undergarment 2 and interchangeable waistband member 1 hero embodiments.

[0012] FIGS. 15A-C are cross-sectional views illustrating representative latching configuration implementations.

[0013] FIGS. 16A-I illustrate a representative attachment sequence of the lower base undergarment 2 and interchangeable waistband member 1 hero embodiments.

[0014] FIGS. 17A-21B are flat views of another lower base undergarment 2 configured as a thong (FIGS. 17A-B), a cheeky (FIGS. 18A-B), a brief (FIGS. 19A-B), a trunk (FIGS. 20A-B), and a boxer brief (FIGS. 21A-B).

[0015] FIGS. 22A-26B are flat views of another interchangeable waistband member 1 configured as a jean waistband (FIGS. 22A-B), a trouser waistband (FIGS. 23A-B), a basketball short waistband (FIGS. 24A-B), a traditional woven boxer waistband (FIGS. 25A-B), and a bloomer waistband (FIGS. 26A-B).

[0016] FIGS. 27A-D are flat and worn views of the hero embodiment of the interchangeable fold over member 22 configured as a mini skirt fold over.

[0017] FIGS. 28A-29D are flat and worn views of another interchangeable fold over member 22 configured as a midi skirt (FIGS. 28A-D) and a maxi skirt (FIGS. 29A-D).

[0018] FIGS. 30A-L illustrate a representative attachment sequence of the lower base undergarment 2 and interchangeable fold over member 22 hero embodiments.

[0019] FIGS. 31A-34C are flat views of the upper base undergarment 19 hero embodiment configured as a bralette, shown in closed and open configurations demonstrating example latching configurations.

[0020] FIGS. 35A-37B are flat views of another upper base undergarment 19 configured as an underwire bra (FIGS. 35A-B), a sports bra (FIGS. 36A-B), and a bandeau (FIGS. 37A-B).

[0021] FIGS. 38A-B are flat and worn views of the hero embodiment of the interchangeable underlay member 24 configured as a medium-length button-down underlay.

[0022] FIGS. 39A-40B are flat and worn views of another interchangeable underlay member 24 configured as a short-length tank-top-style underlay (FIGS. 39A-B) and a long-length lace-style underlay (FIGS. 40A-B).

[0023] FIGS. 41A-J illustrate a representative attachment sequence of the upper base undergarment 19 and interchangeable underlay member 24 hero embodiments.

[0024] FIGS. 42A-43 are flat views and a worn view of the hero embodiment of the interchangeable tuck away member 26 configured as a button-down-style tuck away.

[0025] FIGS. 44A-46B are flat views of another interchangeable tuck away member 26 configured as a tank top (FIGS. 44A-B), a t-shirt (FIGS. 45A-B), and a long-sleeve shirt (FIGS. 46A-B).

[0026] FIGS. 47A-K illustrate a representative attachment sequence of another trunk-style lower base undergarment 2 and the button-down-style interchangeable tuck away member 26 hero embodiment.

[0027] FIGS. 48A-B are front and back views of a permanently affixed embodiment of an interchangeable waistband member 1 (jean-style variant) and a lower base undergarment 2 (trunk-style variant).DETAILED DESCRIPTION

[0028] The rising trend of wearing boxers or other undergarments under loose-fitting pants presents several challenges. As this trend has evolved, many wearers have found it challenging to wear certain undergarments under pants with a slimmer silhouette. Layering causes discomfort and distorts the figure. Women are particularly inclined toward this trend and often wear men's boxers under their pants to achieve the layered look. However, since most boxers are designed for the male body, they tend to be uncomfortable and unflattering for women. This challenge also applies to bloomers, as people aim for a layered look with them but struggle to find bloomers that lay properly under pants. Even when bloomers do layer correctly, they often aren't compatible with more form-fitting bottoms that have a slimmer silhouette around the hips.

[0029] The invention disclosed herein relates to modular layering garment systems including a modular attachment system configured to couple a Base undergarment and an interchangeable member at a defined interface. The modular attachment system is the core focus of the present disclosure and is described across lower-body and upper-body implementations, multiple garment categories, and multiple coupling arrangements.

[0030] An example layering garment is disclosed that provides the visual appearance of wearing multiple pairs of pants by simulating undergarments or secondary trousers layered beneath outerwear, without the physical bulk or discomfort typically associated with wearing multiple separate garments. Having the appearance of layering more than one pair of pants reflects a shift toward bold self-expression, versatility, and sustainability in fashion. As this trend continues to evolve, the layering garment invites wearers to explore their personal style while making a statement about their creativity. Whether on the streets or in high fashion, this layered look is likely to remain a captivating element of contemporary style.

[0031] An example modular layering garment system is provided including a base undergarment and an interchangeable member that are separable components configured for releasable coupling. The base undergarment includes an interface region and a modular attachment system positioned at the interface region. The modular attachment system features channel-forming flaps 5, which include an inner flap 6 positioned on a body-facing side and secured along at least one attachment line, and an outer flap 7 positioned opposite the inner flap 6 and secured along a hinge zone 11. Together, the inner flap 6 and the outer flap 7 define an insert-receiving channel 12. The outer flap 7 is movable about the hinge zone 11 between an open configuration exposing an opening region of the insert-receiving channel 12, and a closed configuration wherein the outer flap 7 overlies the inner flap 6 to cover and at least partially enclose the insert-receiving channel 12. The modular attachment system further includes at least one latching element 9 disposed at an engagement region 8.

[0032] In an example, the interchangeable member includes a visible body portion extending from an insert portion 14 configured to be removably received within the insert-receiving channel 12 through the opening region when the outer flap 7 is in the open configuration. The insert portion 14 includes opposing first 17 and second flat sides 18 configured to contact opposing surfaces of the inner flap 6 and the outer flap 7 when seated within the insert-receiving channel 12. The insert portion 14 further includes at least one engagement feature configured to cooperate with the latching element 9 to releasably couple the interchangeable member to the base undergarment. In an assembled condition, the insert portion 14 is seated within the insert-receiving channel 12, the outer flap 7 is repositioned to the closed configuration restricting access to the opening region, and the interchangeable member is releasably retained relative to the base undergarment by structural capture of the insert portion 14 between the channel-forming flaps 5 alongside latching engagement at the engagement region 8. The engagement feature of the insert portion 14 includes either: (i) corresponding latching elements 10 configured for direct mating engagement with the base undergarment latching elements 9, or (ii) entry points 16 extending through the insert portion 14 configured to align with latching elements 9 to permit releasable engagement while the insert portion 14 remains seated.

[0033] In an example, the base undergarment may be configured for different regions of the body. In an example, the base undergarment is a lower base undergarment 2 configured for wear on a lower torso region, wherein the interface region includes a waist region 3. The lower base undergarment 2 may be configured as a silhouette selected from a boyshort, a thong, a cheeky, a brief, a trunk, and a boxer brief. In other embodiments, the base undergarment is an upper base undergarment 19 configured for wear on an upper torso region, wherein the interface region includes a band region 20. The upper base undergarment 19 may be configured as a silhouette selected from a bralette, an underwire bra, a sports bra, and a bandeau.

[0034] In an example, the interchangeable member may likewise be configured in various silhouettes and styles. The interchangeable member may be an interchangeable waistband member 1 having the insert portion 14 positioned along a lower region and a visible waistband body portion 13 extending circumferentially and positioned externally relative to the base undergarment. Waistband silhouettes may include a sweatpant waistband, a jean waistband, a trouser waistband, a basketball short waistband, a traditional woven boxer waistband, and a bloomer waistband. Alternatively, the interchangeable member may be an interchangeable fold over member 22 having the insert portion 14 positioned along an upper region and a visible fold over body portion 23 configured to overlie at least an upper portion of a lower body garment. Fold over silhouettes include a mini skirt fold over, a midi skirt fold over, and a maxi skirt fold over.

[0035] Further interchangeable member variations include underlay and tuck away options. The interchangeable member may be an interchangeable underlay member 24 with an insert portion 14 positioned along an upper region and a visible underlay body portion 25 configured to extend downward beneath an upper body garment. Underlay silhouettes include a medium-length button-down underlay, a short-length tank-top-style underlay, and a long-length lace-style underlay. The interchangeable member may also be an interchangeable tuck away member 26 with an insert portion 14 positioned along a lower region and a visible tuck away body portion 27 extending upward along at least a portion of a torso such that at least a lower portion of the tuck away body portion 27 is retained in a tucked configuration relative to the base undergarment. Tuck away silhouettes include a button-down shirt, a tank top, a t-shirt, and a long-sleeve shirt.

[0036] In an example, the system incorporates releasable coupling configurations. In embodiments utilizing direct mating engagement, the at least one latching element 9 and the at least one corresponding latching element 10 include releasable coupling structures selected from buttons, snaps, hook-and-loop structures, hook-and-eye structures, clasps, interlocking fasteners, g-hooks, push snap buckles, and magnets. In embodiments utilizing engagement through the insert portion 14, the outer flap 7 further includes corresponding latching elements 10 configured to engage the latching elements 9 of the base undergarment through entry points 16 when the outer flap 7 is moved toward the closed configuration. These entry points 16 may include openings, slits, cut-outs, apertures, notches, reinforced holes, and buttonhole-type openings. Furthermore, latching elements 9 may be positioned at spaced circumferential locations including a front-center region, a back-center region, and one or more side regions around the interface region.

[0037] In an example, the system may include additional retention features. The modular attachment system may further include a high-friction region 15 disposed on at least one of the opposing first 17 and second flat sides 18 of the insert portion 14, a channel-facing side of the inner flap 6, and a channel-facing side of the outer flap 7 to increase frictional engagement and resist relative sliding or withdrawal of the insert portion 14. The high-friction region 15 may include printed elastomer features, silicone features, a textured coating, a friction-enhancing film, a grippy tape, or a high-friction textile structure.

[0038] The modular attachment system may be configured to support releasable coupling between the base undergarment and the interchangeable member through cooperation between interface components including channel-forming flaps 5, an insert-receiving channel 12, an insert portion 14, and, in an example, one or more latching-related components positioned at an engagement region 8. In this manner, the disclosed systems may permit repeated attachment and detachment of compatible garment components while maintaining positional retention, alignment, and a selected aesthetic or functional effect during wear.

[0039] The subject matter described herein includes embodiments directed to lower-body and upper-body garment systems, representative latching configuration families, attachment and detachment sequences. In an example, the disclosed interface arrangements may additionally support permanent attachment implementations. Further embodiments, configurations.

[0040] Before continuing, it is noted that as used herein, the terms “includes” and “including” mean, but is not limited to, “includes” or “including” and “includes at least” or “including at least.” The term “based on” means “based on” and “based at least in part on.”

[0041] Here is a detailed description of the invention based on the provided text, grouped and ordered by the figure numbers.

[0042] FIGS. 1A-D are flat and worn views of the hero embodiments of the lower base undergarment 2 and the interchangeable waistband member 1 in an assembled condition. The modular layering garment system includes a modular attachment system configured to releasably connect a base undergarment and an interchangeable member at a defined interface, permitting repeated attachment and detachment over multiple cycles. In the assembled condition, an insert portion 14 of the interchangeable member is received within an insert-receiving channel 12 defined by channel-forming flaps 5 of the base undergarment so as to position the interchangeable member relative to the base undergarment at the interface and maintain alignment during wear. Retention is provided by structural capture of the insert portion 14 within the insert-receiving channel 12, frictional engagement between interfacing components, releasable latching engagement at an engagement region 8, or combinations thereof, while still permitting intentional manual release. These figures depict assembled front, back, and side views of the interchangeable waistband member 1 configured as a sweatpant waistband coupled to a lower base undergarment 2 configured as a boyshort in a closed configuration using a latching configuration, as well as a worn view where a lower body garment (pants) is worn over the lower base undergarment 2.

[0043] FIGS. 2-7 are flat views of the hero embodiment of the lower base undergarment 2 configured as a boyshort, shown in both closed and open configurations. The lower base undergarment 2 is worn on a lower torso region, covers at least the groin and buttock regions, and includes a waist region 3 and a lower body region 4 with leg openings. It may include a front portion, a back portion, a crotch region (optionally with a gusset), and may be formed from textile materials like stretch knit fabrics. The modular attachment system is positioned at an upper portion of the lower base undergarment 2 and extends around at least a portion of the waist opening. The system includes channel-forming flaps 5 including an inner flap 6 and an outer flap 7 that define an insert-receiving channel 12 configured to removably receive an insert portion 14. The inner flap 6 is positioned on a body-facing side, secured along at least one attachment line, and may include elastic reinforcement to lie flat against the wearer, reducing rolling or folding. The outer flap 7 is positioned opposite the inner flap 6 and is secured along an attachment line defining a hinge zone 11, permitting movement of the outer flap 7 between the open and closed configurations. The insert-receiving channel 12 has a height and a depth sized to receive the insert portion 14, where structural retention is provided by contact between the inner 6 and outer flaps 7 against opposing surfaces of the insert portion 14, aided by circumferential stretch of the waist region during wear. In the closed configuration (FIGS. 2-4), the outer flap 7 overlies the inner flap 6 to cover and at least partially enclose the insert-receiving channel 12, restricting access to the opening region and assisting in retaining the insert portion 14 during wear. In the open configuration (FIGS. 5-7), the outer flap 7 is repositioned relative to the inner flap 6 (e.g., folded or pivoted about the hinge zone 11) to expose an opening region of the insert-receiving channel 12, permitting insertion and withdrawal of the insert portion 14. The lower base undergarment 2 further includes one or more latching elements 9 associated with the modular attachment system, which participate in releasable coupling at an engagement region 8 and may be positioned at various circumferential locations (front-center, back-center, sides). These latching elements 9 may be secured to the inner flap 6, outer flap 7, or adjacent to the hinge zone 11.

[0044] FIGS. 8-11 are flat and transparent angle views of the hero embodiment of the interchangeable waistband member 1 configured as a sweatpant waistband. The interchangeable waistband member 1 extends circumferentially as a continuous loop around the wearer during use and aligns with the waist region 3 of the lower base undergarment 2. It includes a waistband body portion 13 and a lower region defining an insert portion 14 configured to be removably received within the insert-receiving channel 12. The waistband body portion 13 includes a visible body portion positioned externally relative to the lower base undergarment 2 and may include elasticized regions, drawstrings, pockets, or other aesthetic details. The insert portion 14 extends circumferentially and includes opposing first 17 and second flat sides 18 defined by material layers. When received in the insert-receiving channel 12, the first flat side 17 faces outward away from the wearer and the second flat side 18 faces inward, contacting opposing surfaces of the inner 6 and outer flaps 7. The insert portion 14 may include a high-friction region 15 on one or both flat sides to increase frictional engagement with the channel-forming flaps 5, resisting relative sliding, shifting, or withdrawal during wear. The high-friction region 15 can be printed elastomer, silicone, a textured coating, or grippy tape. In this configuration, the insert portion 14 includes one or more corresponding latching elements 10 positioned on one or both flat sides to directly engage the latching elements 9 of the lower base undergarment 2. The corresponding latching elements 10 may be located at multiple circumferential locations and are implemented as releasable coupling structures like hook-and-loop, snaps, clasps, buttons, or magnets.

[0045] FIGS. 12A-B are transparent angle views showing the hero embodiment of the interchangeable waistband member 1 aligned for attachment to the lower base undergarment 2. The lower base undergarment 2 is shown in an open configuration to expose the opening region of the insert-receiving channel 12. The interchangeable waistband member 1 is shown spaced above with its insert portion 14 positioned circumferentially to correspond with the insert-receiving channel 12. Direction arrows indicate a downward insertion direction in which the insert portion 14 is advanced into the insert-receiving channel 12 along a waistband path toward the engagement region 8. The engagement region 8 refers to a designated region of the modular attachment system where engagement, alignment, and retention between components occur, serving as a consistent interface reference. When further aligned, the components register at the engagement region 8 along the waist interface prior to the engagement of latching components and the repositioning of the outer flap 7 to the closed configuration.

[0046] FIGS. 13A-J are cross-sectional views illustrating representative latching configuration implementations. In these latching configurations, releasable coupling is achieved through direct mating engagement between latching elements 9 associated with the base undergarment and corresponding latching elements 10 associated with the insert portion 14. The figures show the insert portion 14 seated within the insert-receiving channel 12 and structurally captured by the channel-forming flaps 5, with the outer flap 7 partially displaced to depict the open configuration. The implementations shown include a smaller / narrower hook-and-loop arrangement on the inner flap 6 and insert portion 14 (FIG. 13A), a larger / wider hook-and-loop arrangement (FIG. 13B), a button-style coupling (FIG. 13C), snap fasteners optionally combined with magnets (FIG. 13D), hook-and-loop tape (FIG. 13E), interlocking fasteners (FIG. 13F), g-hooks (FIG. 13G), garter hook components (FIG. 13H), interlocking twin clasps (FIG. 13I), and push snap buckles (FIG. 13J).

[0047] FIGS. 14A-I illustrate a representative attachment sequence of the lower base undergarment 2 and interchangeable waistband member 1 hero embodiments implemented in a latching configuration. Attachment begins with the components separate and the lower base undergarment 2 in the closed configuration (FIG. 14A). The outer flap 7 is moved downward about the hinge zone 11 relative to the inner flap 6 to the open configuration to expose the opening region of the insert-receiving channel 12 (FIG. 14B). The insert portion 14 is then aligned, inserted, and seated into the insert-receiving channel 12, entering the engagement region 8 (FIG. 14C). Direct mating engagement then occurs between each latching element 9 on the inner flap 6 and each corresponding latching element 10 on the insert portion 14 at a plurality of circumferential locations (FIGS. 14D-E). Once seated and engaged, the outer flap 7 is repositioned about the hinge zone 11 toward the closed configuration (FIG. 14F). The fully attached condition features the insert portion 14 seated within the insert-receiving channel 12, the latching components engaged, and the outer flap 7 overlying the opening region to cover and at least partially enclose the interface (FIGS. 14G-I). Detachment is carried out by reversing this sequence, moving the outer flap 7 to the open configuration, disengaging the latching components, and withdrawing the insert portion 14.

[0048] FIGS. 15A-C are cross-sectional views illustrating representative latching configuration implementations. In these configurations, releasable coupling occurs while the insert portion 14 remains seated within the insert-receiving channel 12. The insert portion 14 includes one or more entry points 16—such as openings, slits, cut-outs, or buttonholes—aligned at the engagement region 8 with latching elements 9 associated with the base undergarment. As the outer flap 7 moves toward the closed configuration, corresponding latching elements 10 associated with the outer flap 7 engage the latching elements 9 through the entry points 16. Implementations shown include a button-style coupling (FIG. 15A), snap fasteners optionally combined with magnets (FIG. 15B), and a keyhole-style coupling (FIG. 15C).

[0049] FIGS. 16A-I illustrate a representative attachment sequence of the lower base undergarment 2 and interchangeable waistband member 1 hero embodiments implemented in a latching configuration. Attachment begins with the lower base undergarment 2 in the closed configuration (FIG. 16A). The outer flap 7 is moved about the hinge zone 11 to expose the opening region (FIG. 16B). The insert portion 14 is aligned and seated into the insert-receiving channel 12 such that each latching element 9 on the inner flap 6 registers with each entry point 16 on the insert portion 14 while the outer flap 7 remains open (FIGS. 16C-D). The outer flap 7 is then repositioned partially into the closed configuration so that the corresponding latching elements 10 on the outer flap 7 engage the latching elements 9 through the entry points 16 at the engagement region 8 (FIG. 16E). The outer flap 7 continues toward the closed configuration (FIG. 16F). In the attached condition, the insert portion 14 remains seated, and the outer flap 7 overlies the opening region to enclose the interface (FIGS. 16G-I).

[0050] FIGS. 17A-21B are flat views of another lower base undergarment 2, each including an inner flap 6, an outer flap 7, an insert-receiving channel 12, and configured to maintain compatibility with an interchangeable member through the modular attachment system. FIGS. 17A-B depict a thong variant providing reduced rear coverage with a narrow rear portion. FIGS. 18A-B depict a cheeky variant with higher-cut leg openings and a reduced seat coverage profile. FIGS. 19A-B depict a brief variant with a higher leg opening and front coverage profile suitable for a male wearer. FIGS. 20A-B depict a trunk variant providing increased leg length and a generally straight leg opening extending partially down the upper thigh. FIGS. 21A-B depict a boxer brief variant providing further increased leg length and extended lower-body coverage down the thigh.

[0051] FIGS. 22A-26B are flat views of interchangeable waistband members 1, each defining an insert portion 14 along a lower region and featuring a waistband body portion 13 shaped to present a distinct style geometry. FIGS. 22A-B depict a jean waistband configured with a zipper, button, pocket, or belt-loop structure. FIGS. 23A-B depict a trouser waistband that may include pocket structures or pleat-simulating details. FIGS. 24A-B depict a basketball short waistband. FIGS. 25A-B depict a traditional woven boxer waistband. FIGS. 26A-B depict a bloomer waistband.

[0052] FIGS. 27A-D are flat and worn views of the hero embodiment of the interchangeable fold over member 22 configured as a mini skirt fold over. The interchangeable fold over member 22 extends circumferentially as a continuous loop and aligns with the waist region 3 of the lower base undergarment 2. It includes a fold over body portion 23 and an upper region defining an insert portion 14 to be removably received within the insert-receiving channel 12. The fold over body portion 23 includes a visible portion configured to overlie at least a portion of the wearer's lower body, positioned externally relative to a lower body garment to provide a fold over layered effect. In the mini skirt variant, the fold over body portion 23 extends downward to end at or near a thigh region. The insert portion 14 includes opposing flat sides, and optionally includes a high-friction region 15, entry points 16, or corresponding latching elements 10.

[0053] FIGS. 28A-29D are flat and worn views of interchangeable fold over members 22. FIGS. 28A-D depict a midi skirt variant where the fold over body portion 23 extends downward to end at or near a knee region. FIGS. 29A-D depict a maxi skirt variant where the fold over body portion 23 extends downward to end at or near an ankle region.

[0054] FIGS. 30A-L illustrate a representative attachment sequence of the lower base undergarment 2 and interchangeable fold over member 22 hero embodiments implemented in a latching configuration. The sequence begins with the wearer wearing the lower base undergarment 2 in the closed configuration (FIG. 30A). The outer flap 7 is moved to the open configuration to expose the channel (FIG. 30B). The interchangeable fold over member 22 is positioned while the wearer holds the fold over body portion 23 upward to access the waist interface (FIG. 30C). The insert portion 14 is seated such that the entry points 16 register with the latching elements 9 (FIGS. 30D-E). The outer flap 7 is repositioned so the latching arrangement engages at the engagement region 8 (FIG. 30F), establishing the attached waist-interface condition (FIGS. 30G-H). A lower body garment (e.g., pants) is then worn over the lower base undergarment 2 (FIG. 301), and the fold over body portion 23 is folded downward over an upper portion of the lower body garment (FIG. 30J). In the fully assembled condition, the fold over body portion 23 is positioned externally of the lower body garment (FIGS. 30K-L).

[0055] FIGS. 31A-34C are flat views of the upper base undergarment 19 hero embodiment configured as a bralette. The upper base undergarment 19 is worn on an upper torso region, covering at least a chest region, and includes a band region 20 and an upper body region 21 (chest-covering region) with left and right chest-covering portions and shoulder straps. The modular attachment system is positioned at a lower portion of the upper base undergarment 19 and extends along at least a portion of the band region 20. The channel-forming flaps 5 define an insert-receiving channel 12, behaving similarly to the lower base undergarment 2, providing open and closed configurations via a hinge zone 11. Circumferential stretch of the band region 20 during wear increases contact pressure for retention. The figures demonstrate both a latching configuration as shown in FIGS. 31A-C closed, FIGS. 32A-C open, and a latching configuration as shown in FIGS. 33A-C closed, FIGS. 34A-C open.

[0056] FIGS. 35A-37B are flat views of upper base undergarments 19, each including an inner flap 6, an outer flap 7, and an insert-receiving channel 12 at the band region 20. FIGS. 35A-B depict an underwire bra variant offering a more structured configuration with shaped cups and underwire support elements. FIGS. 36A-B depict a sports bra variant extending across a greater area of the upper torso with wider straps and increased support. FIGS. 37A-B depict a bandeau variant extending across the front without strap portions.

[0057] FIGS. 38A-B are flat and worn views of the hero embodiment of the interchangeable underlay member 24 configured as a medium-length button-down underlay. The interchangeable underlay member 24 extends circumferentially around the wearer and aligns with the band region 20 of the upper base undergarment 19. It includes an underlay body portion 25 and an upper region defining an insert portion 14. The underlay body portion 25 is configured to extend downward beneath an upper body garment to provide a layered visual effect, additional coverage, and a visible underlayer effect. In this medium-length variant, the underlay body portion 25 hangs downward from the torso region. The worn view illustrates a sweater vest worn over the upper base undergarment 19 and an upper region of the underlay body portion 25.

[0058] FIGS. 39A-40B are flat and worn views of interchangeable underlay members 24. FIGS. 39A-B depict a short-length tank-top-style underlay extending downward to end at or near a waist region. FIGS. 40A-B depict a long-length lace-style underlay extending downward to end at or near a lower leg region of the wearer.

[0059] FIGS. 41A-J illustrate a representative attachment sequence of the upper base undergarment 19 and interchangeable underlay member 24 hero embodiments implemented in a latching configuration. Attachment begins with the upper base undergarment 19 in the closed configuration (FIG. 41A). The outer flap 7 is moved to expose the opening region of the insert-receiving channel 12 (FIG. 41B). The insert portion 14 is inserted and seated at the engagement region 8 (FIG. 41C). Direct mating engagement of latching components occurs (FIGS. 41D-E). The outer flap 7 is repositioned to the closed configuration (FIG. 41F). In the attached condition, the interface is enclosed (FIGS. 41G-H). An upper body garment is then worn over the upper base undergarment 19, allowing the underlay member to extend downward beneath it (FIGS. 41I-J).

[0060] FIGS. 42A-43 are flat views and a worn view of the hero embodiment of the interchangeable tuck away member 26 configured as a button-down-style tuck away. The interchangeable tuck away member 26 includes a tuck away body portion 27 (upper body garment portion) and a lower region defining an insert portion 14 configured for releasable coupling to a lower base undergarment 2. In use, the lower base undergarment 2 is worn beneath a lower body garment, and the tuck away body portion 27 extends upward from the waist region along the wearer's torso. At least a lower portion of the tuck away body portion 27 is retained in a tucked configuration relative to the lower base undergarment 2 to maintain the appearance and / or function of a tucked upper body garment.

[0061] FIGS. 44A-46B are flat views of interchangeable tuck away members 26, all of which feature tuck away body portions 27 extending upward from the waist region. FIGS. 44A-B depict a tank-top-style tuck away member. FIGS. 45A-B depict a t-shirt-style tuck away member. FIGS. 46A-B depict a long-sleeve-shirt-style tuck away member.

[0062] FIGS. 47A-K illustrate a representative attachment sequence of another trunk-style lower base undergarment 2 and the button-down-style interchangeable tuck away member 26 hero embodiment, implemented in a latching configuration. The sequence starts with the closed lower base undergarment 2 (FIG. 47A), moves to the open configuration (FIG. 47B), followed by inserting and seating the insert portion 14 (FIG. 47C). The latching components engage at the engagement region 8 (FIGS. 47D-F). The outer flap 7 is returned to the closed configuration (FIG. 47G). The fully attached condition is established (FIGS. 47H-I). A lower body garment is then worn over the lower base undergarment 2 while the tuck away body portion 27 remains visible to provide the tucked appearance (FIGS. 47J-K).

[0063] FIGS. 48A-B are front and back views of a permanently affixed embodiment of an interchangeable waistband member 1 (jean-style variant) and a lower base undergarment 2 (trunk-style variant). While the modular attachment system primarily enables releasable coupling, in an example, the interface arrangements support permanent attachment implementations. Here, the interchangeable waistband member 1 is fixed relative to the lower base undergarment 2 along an upper region (e.g., permanently affixed at or adjacent to the engagement region 8 by stitching, bonding, or welding) rather than removably coupled thereto.Base Undergarment Hero Embodiments

[0064] Lower Base Undergarment Hero Embodiment—Boyshort. The modular attachment system includes a base undergarment and an interchangeable member that are separable components. The base undergarment may be implemented as either a lower base undergarment 2 or an upper base undergarment 19, depending on the intended area of wear. The lower base undergarment 2 is configured for wear on a lower torso region of a wearer and covers at least the groin and buttock regions. In the hero embodiment, the lower base undergarment 2 is implemented as a boyshort silhouette, as shown in FIGS. 2-4. The lower base undergarment 2 includes a waist region 3 and a lower body region 4 with leg openings defining a boyshort-style profile.

[0065] The lower base undergarment 2 may be formed from any suitable textile material, including knit or stretch knit fabrics. Representative examples include cotton / spandex blends, nylon / spandex blends, and other elastic textiles. Seams and finishes may include stitching, bonding, taping, or combinations thereof.

[0066] In this hero embodiment, the lower base undergarment 2 includes a front portion, a back portion, and a crotch region, as shown in FIGS. 2-4. In an example, a gusset may be provided in the crotch region and may include one or more layers, including a lining layer. The various portions of the lower base undergarment 2 may be joined by seams or other suitable construction techniques. These construction features are representative only, and other garment constructions may be used.

[0067] The waist region 3 includes a portion of the modular attachment system, as shown in FIGS. 2-7. In this embodiment, the modular attachment system includes channel-forming flaps 5 including an inner flap 6 and an outer flap 7 positioned at an upper portion of the lower base undergarment 2 and extending around at least a portion of the waist opening. The channel-forming flaps 5 define an insert-receiving channel 12 configured to removably receive an insert portion 14 of an interchangeable member.

[0068] As shown in FIGS. 2-4, the lower base undergarment 2 may be in a closed configuration in which the outer flap 7 overlies the inner flap 6 to cover and at least partially enclose the insert-receiving channel 12 and retain the insert portion 14 therein. As shown in FIGS. 5-7, the lower base undergarment 2 may be in an open configuration in which the outer flap 7 is repositioned relative to the inner flap 6 to expose an opening region of the insert-receiving channel 12, thereby permitting insertion and withdrawal of the insert portion 14 relative to the insert-receiving channel 12.

[0069] Channel-Forming Flaps. The modular attachment system includes channel-forming flaps 5 including an inner flap 6 and an outer flap 7 positioned at an upper portion of the lower base undergarment 2 and extending around at least a portion of the waist opening, as shown in FIGS. 2-7. Together, the inner flap 6 and the outer flap 7 define the insert-receiving channel 12 and cooperate to receive and retain the insert portion 14 of a compatible interchangeable member.

[0070] In the closed configuration (FIGS. 2-4), the outer flap 7 overlies the inner flap 6 along at least a portion of the waist region 3 to cover and at least partially enclose the insert-receiving channel 12. In the open configuration (FIGS. 5-7), the outer flap 7 is repositioned relative to the inner flap 6 to expose an opening region of the insert-receiving channel 12. In an example, the channel-forming flaps 5 align at an engagement region 8 where releasable coupling occurs between interface components.

[0071] Inner Flap. The inner flap 6 is positioned on a body-facing side of the lower base undergarment 2 such that, in use, the inner flap 6 contacts the wearer's body. The inner flap 6 is secured along at least one attachment line at the waist region 3 and defines one side of the insert-receiving channel 12. In an example, the inner flap 6 may include elastic reinforcement and / or a high-friction region 15.

[0072] Outer Flap. The outer flap 7 is positioned opposite the inner flap 6 and is movable between the open configuration and the closed configuration. The outer flap 7 is secured along an attachment line defining a hinge zone 11 and defines an opposite side of the insert-receiving channel 12. In an example, the outer flap 7 may include a high-friction region 15.

[0073] Insert-Receiving Channel. The insert-receiving channel 12 is defined as the space between the inner flap 6 and the outer flap 7, as shown in FIGS. 5-7. The insert-receiving channel 12 is configured to removably receive an insert portion 14 of an interchangeable member through the opening region exposed in the open configuration. In the open configuration, the outer flap 7 is repositioned away from the inner flap 6 about the hinge zone 11 to expose the opening region of the insert-receiving channel 12 and permit insertion or withdrawal of the insert portion 14. In the closed configuration, the outer flap 7 overlies the opening region such that the insert-receiving channel 12 is covered and at least partially enclosed.

[0074] The insert-receiving channel 12 has a height and a depth configured to receive the insert portion 14. In an example, retention may be provided structurally by contact between the inner flap 6 and the outer flap 7 against opposing surfaces of the insert portion 14 when the insert portion 14 is received within the insert-receiving channel 12. In an example, circumferential stretch of the waist region 3 during wear increases contact pressure between the channel-forming flaps 5 and the insert portion 14 within the insert-receiving channel 12.

[0075] iii. Latching Elements. The lower base undergarment 2 may include one or more latching elements 9 associated with the modular attachment system (FIGS. 5-7). The one or more latching elements 9 are configured to participate in releasable coupling between the lower base undergarment 2 and an interchangeable member when the insert portion 14 is received within the insert-receiving channel 12. Releasable coupling may occur at the engagement region 8 and may be implemented according to different latching families, including an Example A latching configuration and an Example B latching configuration using one or more corresponding latching elements 10 disposed on a mating interface component.

[0076] The one or more latching elements 9 may be positioned at circumferential locations including a front-center region, a back-center region, one or more side regions, and / or multiple locations around the waist opening. The one or more latching elements 9 may be provided as spaced locations or as a generally continuous latching strip.

[0077] The latching elements 9 may be secured to the inner flap 6, the outer flap 7, and / or a region adjacent to the hinge zone 11 by any suitable technique, including stitching, bar-tacking, bonding, welding, capture within a seam, or combinations thereof.Upper Base Undergarment Hero Embodiment—Bralette.

[0078] The base undergarment may be implemented as either a lower base undergarment 2 or an upper base undergarment 19, depending on the intended area of wear. The upper base undergarment 19 is configured for wear on an upper torso region of a wearer and supports and covers at least a chest region of the wearer. In the hero embodiment, the upper base undergarment 19 is implemented as a bralette silhouette, as shown in FIGS. 31A-C and FIGS. 33A-C. The upper base undergarment 19 includes a band region 20 and a chest-covering region, with the band region 20 extending around at least a portion of the upper torso of the wearer.

[0079] The upper base undergarment 19 may be formed from any suitable textile material, including knit or stretch knit fabrics. Representative examples include cotton / spandex blends, nylon / spandex blends, and other elastic textiles. Seams and finishes may include stitching, bonding, taping, or combinations thereof.

[0080] In this hero embodiment, the upper base undergarment 19 includes left and right chest-covering portions positioned at a forward body portion of the garment, as shown in FIG. 31A. The upper base undergarment 19 may further include strap portions configured to pass over corresponding shoulder regions of the wearer, as shown in FIGS. 31A-C. In an example, the chest-covering portions may be formed from one or more fabric panels and may optionally include lining layers, support layers, or double-layer constructions. Side regions of the upper base undergarment 19 extend between the chest-covering region and a rear body portion, as shown in FIGS. 31B-C. These construction features are representative only, and other upper-body garment constructions may be used.

[0081] The band region 20 includes a portion of the modular attachment system, as shown in FIGS. 31A-34C. In this embodiment, the modular attachment system includes channel-forming flaps 5 including an inner flap 6 and an outer flap 7 positioned at a lower portion of the upper base undergarment 19 and extending along at least a portion of the band region 20. The channel-forming flaps 5 define an insert-receiving channel 12 configured to removably receive an insert portion 14 of an interchangeable member.

[0082] As shown in FIGS. 31A-C and FIGS. 33A-C, the upper base undergarment 19 may be in a closed configuration in which the outer flap 7 overlies the inner flap 6 to cover and at least partially enclose the insert-receiving channel 12 and retain the insert portion 14 therein. As shown in FIGS. 32A-C and FIGS. 34A-C, the upper base undergarment 19 may be in an open configuration in which the outer flap 7 is repositioned relative to the inner flap 6 to expose an opening region of the insert-receiving channel 12, thereby permitting insertion and withdrawal of the insert portion 14 relative to the insert-receiving channel 12.

[0083] Channel-Forming Flaps. The modular attachment system includes channel-forming flaps 5 including an inner flap 6 and an outer flap 7 positioned at a lower portion of the upper base undergarment 19 and extending along at least a portion of the band region 20, as shown in FIGS. 31A-34C. Together, the inner flap 6 and the outer flap 7 define the insert-receiving channel 12 and cooperate to receive and retain the insert portion 14 of a compatible interchangeable member.

[0084] In the closed configuration (FIGS. 31A-C and FIGS. 33A-C), the outer flap 7 overlies the inner flap 6 along at least a portion of the band region 20 to cover and at least partially enclose the insert-receiving channel 12. In the open configuration (FIGS. 32A-C and FIGS. 34A-C), the outer flap 7 is repositioned relative to the inner flap 6 to expose an opening region of the insert-receiving channel 12. In an example, the channel-forming flaps 5 align at an engagement region 8 where releasable coupling occurs between interface components.

[0085] Inner Flap. The inner flap 6 is positioned on a body-facing side of the upper base undergarment 19 such that, in use, the inner flap 6 contacts the wearer's body. The inner flap 6 is secured along at least one attachment line at the band region 20 and defines one side of the insert-receiving channel 12. In an example, the inner flap 6 may include elastic reinforcement and / or a high-friction region 15.

[0086] Outer Flap. The outer flap 7 is positioned opposite the inner flap 6 and is movable between the open configuration and the closed configuration. The outer flap 7 is secured along an attachment line defining a hinge zone 11 and defines an opposite side of the insert-receiving channel 12. In an example, the outer flap 7 may include a high-friction region 15.

[0087] Insert-Receiving Channel. The insert-receiving channel 12 is defined as the space between the inner flap 6 and the outer flap 7, as shown in FIGS. 32A-C and FIGS. 34A-C. The insert-receiving channel 12 is configured to removably receive an insert portion 14 of an interchangeable member through the opening region exposed in the open configuration. In the open configuration, the outer flap 7 is repositioned away from the inner flap 6 about the hinge zone 11 to expose the opening region of the insert-receiving channel 12 and permit insertion or withdrawal of the insert portion 14. In the closed configuration, the outer flap 7 overlies the opening region such that the insert-receiving channel 12 is covered and at least partially enclosed.

[0088] The insert-receiving channel 12 has a height and a depth configured to receive the insert portion 14. In an example, retention may be provided structurally by contact between the inner flap 6 and the outer flap 7 against opposing surfaces of the insert portion 14 when the insert portion 14 is received within the insert-receiving channel 12. In an example, circumferential stretch of the band region 20 during wear increases contact pressure between the channel-forming flaps 5 and the insert portion 14 within the insert-receiving channel 12.

[0089] Latching Elements. The upper base undergarment 19 may include one or more latching elements 9 associated with the modular attachment system (FIGS. 32A-C). The one or more latching elements 9 are configured to participate in releasable coupling between the upper base undergarment 19 and an interchangeable member when the insert portion 14 is received within the insert-receiving channel 12. Releasable coupling may occur at the engagement region 8 and may be implemented according to different latching families, including an Example A latching configuration and an Example B latching configuration using one or more corresponding latching elements 10 disposed on a mating interface component.

[0090] The one or more latching elements 9 may be positioned at circumferential locations including a front-center region, a back-center region, one or more side regions, and / or multiple locations around the band region 20. The one or more latching elements 9 may be provided as spaced locations or as a generally continuous latching strip.

[0091] The latching elements 9 may be secured to the inner flap 6, the outer flap 7, and / or a region adjacent to the hinge zone 11 by any suitable technique, including stitching, bar-tacking, bonding, welding, capture within a seam, or combinations thereof.Interchangeable Member Hero Embodiments.

[0092] Interchangeable Waistband Member Hero Embodiment—Sweatpant. The modular attachment system further includes an interchangeable member separable from a base undergarment and configured for releasable coupling therewith during wear by a wearer. The interchangeable member may be implemented as an interchangeable waistband member 1, an interchangeable fold over member 22, an interchangeable underlay member 24, or an interchangeable tuck away member 26, each configured to cooperate with a base undergarment to provide a selected aesthetic appearance, functional coverage, garment layering effect, and / or positional retention of an associated garment portion.

[0093] The interchangeable waistband member 1 is configured to be worn on a torso region of a wearer in combination with a lower base undergarment 2. In the hero embodiment, the interchangeable waistband member 1 extends circumferentially as a continuous loop around the wearer during use and is configured to align with the waist region 3 of the lower base undergarment 2. As shown in FIGS. 8-10, the interchangeable waistband member 1 is implemented as a sweatpant-style waistband and includes a waistband body portion 13 and a lower region defining an insert portion 14 configured to be removably received within the insert-receiving channel 12 of the lower base undergarment 2.

[0094] In an example, the insert portion 14 extends circumferentially around the interchangeable waistband member 1 and is dimensioned to be received between the inner flap 6 and the outer flap 7 within the insert-receiving channel 12. In an example, the insert portion 14 includes one or more engagement features, including one or more corresponding latching elements 10, one or more entry points 16, and / or a high-friction region 15.

[0095] The interchangeable waistband member 1 may be formed from any suitable textile material, including woven fabrics, knit fabrics, stretch knit fabrics, and combinations thereof. Representative examples include cotton / spandex blends, nylon / spandex blends, fleece constructions, terry constructions, and other elastic or non-elastic textiles. Seams and finishes may include stitching, bonding, taping, or combinations thereof.

[0096] The interchangeable waistband member 1 includes an upper edge region defining a top perimeter of the member and a lower region transitioning into the insert portion 14. In an example, the upper edge region may be finished by a folded hem, bound edge, bonded edge, enclosed elastic, jacquard waistband structure, or combinations thereof.

[0097] Insert Portion. The insert portion 14 includes a lower portion of the interchangeable waistband member 1 and is configured to be removably received within the insert-receiving channel 12 of a lower base undergarment 2. The insert portion 14 extends circumferentially around the interchangeable waistband member 1 and is dimensioned to be received between the inner flap 6 and the outer flap 7 within the insert-receiving channel 12.

[0098] As shown in FIG. 11, the insert portion 14 includes opposing first 17 and second flat sides 18 defined by material layers in the insert portion 14 region. When the insert portion 14 is received within the insert-receiving channel 12, the first flat side 17 faces outward away from the wearer and the second flat side 18 faces inward toward the wearer such that the flat sides contact opposing surfaces of the inner flap 6 and the outer flap 7.

[0099] In an example, the insert portion 14 may include a high-friction region 15 disposed on one or both flat sides to increase frictional engagement within the insert-receiving channel 12. In embodiments implementing an Example A latching configuration, the insert portion 14 may include one or more corresponding latching elements 10 positioned to engage one or more latching elements 9 associated with the lower base undergarment 2. In embodiments implementing an Example B latching configuration, the insert portion 14 may include one or more entry points 16 configured to align with latching locations at the engagement region 8 and to permit releasable engagement between latching components associated with the lower base undergarment 2 while the insert portion 14 remains seated within the insert-receiving channel 12.

[0100] Waistband Body Portion. The waistband body portion 13 includes a visible body portion of the interchangeable waistband member 1 extending from the insert portion 14 and configured to encircle at least a portion of the wearer's torso during use (FIGS. 8-10). In the hero embodiment, the waistband body portion 13 is implemented as a sweatpant-style waistband portion that extends circumferentially around the wearer and is positioned externally relative to the lower base undergarment 2 when the insert portion 14 is received within the insert-receiving channel 12.

[0101] The waistband body portion 13 may be configured to provide a selected waistband appearance, including a sweatpant waistband, boxer-style waistband, denim waistband, trouser waistband, or other waistband configurations. In an example, the waistband body portion 13 may include one or more elasticized regions, folded edge constructions, drawstring structures, seam lines, decorative details, branding elements, label elements, belt-loop structures, faux fly structures, and / or pocket-simulating elements. The waistband body portion 13 may be formed from one or more fabric layers or panels and may include reinforcement features, lining layers, interfacing materials, and / or elastic members. The sweatpant-style waistband embodiment is provided by way of example only and is not limiting.

[0102] Corresponding Latching Elements. The insert portion 14 of the interchangeable waistband member 1 may include one or more corresponding latching elements 10 associated with the modular attachment system (FIGS. 8-10). Releasable coupling at the engagement region 8 may be implemented according to different latching configuration families, including Example A and Example B, and the presence and placement of corresponding latching elements 10 may vary depending on the selected latching example.

[0103] In embodiments implementing an Example A latching configuration, the corresponding latching elements 10 are disposed on the insert portion 14 and are positioned to engage one or more latching elements 9 associated with the lower base undergarment 2 when the insert portion 14 is received within the insert-receiving channel 12. The corresponding latching elements 10 may be disposed on one flat side of the insert portion 14 or on both flat sides of the insert portion 14. The corresponding latching elements 10 may be arranged as a single latching location, a plurality of spaced latching locations, or a generally continuous latching strip extending along at least a portion of the insert portion 14.

[0104] In the hero embodiment, the corresponding latching elements 10 may be provided at a plurality of circumferential locations, including a front-center location, a back-center location, left and right side locations, and optionally additional locations spaced therebetween. The corresponding latching elements 10 may be implemented using any suitable releasable coupling structures, including hook-and-loop, hook-and-eye, snaps, clasps, buttons, magnets, and hybrid combinations thereof. The corresponding latching elements 10 may be secured to the insert portion 14 by any suitable technique, including stitching, bar-tacking, bonding, welding, capture within a seam, or combinations thereof.

[0105] In an example, the insert portion 14 may omit corresponding latching elements 10 and instead include one or more entry points 16 configured to cooperate with latching components associated with the lower base undergarment 2 when the insert portion 14 is seated within the insert-receiving channel 12.

[0106] Entry Points. In an example, the insert portion 14 of the interchangeable waistband member 1 includes one or more entry points 16 associated with the modular attachment system (FIGS. 15A-C). The entry points 16 may be configured to cooperate with latching components associated with the lower base undergarment 2, for example in embodiments implementing an Example B latching configuration in which releasable engagement occurs while the insert portion 14 remains seated within the insert-receiving channel 12.

[0107] The entry points 16 may be positioned on one or both flat sides of the insert portion 14 or may extend through the thickness of the insert portion 14 at selected latching locations. The entry points 16 may be arranged as a single entry location, a plurality of spaced entry locations, or a pattern of entry locations corresponding to one or more engagement regions 8 of the lower base undergarment 2.

[0108] In the hero embodiment, the entry points 16 may be provided at a plurality of circumferential locations, including a front-center location, a back-center location, left and right side locations, and optionally additional locations spaced therebetween. Each entry point 16 may be configured as an opening, aperture, slit, notch, cut-out, reinforced hole, buttonhole-type opening, or other access feature sized and shaped to permit releasable engagement with a corresponding latching component associated with the lower base undergarment 2.

[0109] In an example, one or more entry points 16 may include reinforcement structures to resist stretching, fraying, or deformation during repeated use. The entry points 16 shown in connection with the hero embodiment are provided by way of example only and are not limiting.

[0110] Interchangeable Fold Over Member Hero Embodiment—Mini Skirt. The interchangeable member may be implemented as an interchangeable fold over member 22 configured to be worn on a lower body region 4 of a wearer in combination with a lower base undergarment 2.

[0111] In the hero embodiment, the interchangeable fold over member 22 extends circumferentially as a continuous loop around the wearer during use and is configured to align with the waist region 3 of the lower base undergarment 2. As shown in FIGS. 27A-D, the interchangeable fold over member 22 is implemented as a mini skirt fold over member and includes a fold over body portion 23 and an upper region defining an insert portion 14 configured to be removably received within the insert-receiving channel 12 of the lower base undergarment 2.

[0112] In use, the lower base undergarment 2 is worn beneath a lower body garment, and the fold over body portion 23 is positioned externally relative to the lower body garment such that the fold over body portion 23 overlies an upper portion of the lower body garment to provide a fold over layered effect. In the illustrated mini skirt variant, the fold over body portion 23 extends downward to end at or near a thigh region of the wearer.

[0113] In an example, the insert portion 14 extends circumferentially around the interchangeable fold over member 22 and is dimensioned to be received between the inner flap 6 and the outer flap 7 within the insert-receiving channel 12. In an example, the insert portion 14 includes one or more engagement features, including one or more corresponding latching elements 10, one or more entry points 16, and / or a high-friction region 15.

[0114] The interchangeable fold over member 22 may be formed from any suitable textile material, including woven fabrics, knit fabrics, stretch knit fabrics, and combinations thereof. Representative examples include cotton / spandex blends, nylon / spandex blends, fleece constructions, terry constructions, and other elastic or non-elastic textiles. Seams and finishes may include stitching, bonding, taping, or combinations thereof.

[0115] The interchangeable fold over member 22 includes a lower edge region defining a bottom perimeter of the member and an upper region transitioning into the insert portion 14. In an example, the lower edge region may be finished by a folded hem, bound edge, bonded edge, enclosed elastic, or combinations thereof.

[0116] Insert Portion. The insert portion 14 includes an upper portion of the interchangeable fold over member 22 and is configured to be removably received within the insert-receiving channel 12 of a lower base undergarment 2 (FIGS. 27A-B). The insert portion 14 extends along an upper region of the interchangeable fold over member 22 and is dimensioned to be received between the inner flap 6 and the outer flap 7 within the insert-receiving channel 12.

[0117] The insert portion 14 includes opposing first 17 and second flat sides 18 defined by material layers in the insert portion 14 region. When the insert portion 14 is received within the insert-receiving channel 12, the first flat side 17 faces outward away from the wearer and the second flat side 18 faces inward toward the wearer such that the flat sides contact opposing surfaces of the inner flap 6 and the outer flap 7.

[0118] In an example, the insert portion 14 may include a high-friction region 15 disposed on one or both flat sides to increase frictional engagement within the insert-receiving channel 12. In embodiments implementing an Example A latching configuration, the insert portion 14 may include one or more corresponding latching elements 10 positioned to engage one or more latching elements 9 associated with the lower base undergarment 2. In embodiments implementing an Example B latching configuration, the insert portion 14 may include one or more entry points 16 configured to align with latching locations at the engagement region 8 and to permit releasable engagement between latching components associated with the lower base undergarment 2 while the insert portion 14 remains seated within the insert-receiving channel 12.

[0119] Fold Over Body Portion. The fold over body portion 23 includes a visible body portion of the interchangeable fold over member 22 extending from the insert portion 14 and configured to overlie at least a portion of the wearer's lower body during use. In the hero embodiment shown in FIGS. 27A-D, the fold over body portion 23 is implemented as a mini skirt-style portion that extends circumferentially around the wearer and hangs downward from the waist region 3 when the insert portion 14 is received within the insert-receiving channel 12 of the lower base undergarment 2.

[0120] The fold over body portion 23 may be shaped to provide a selected silhouette, including a straight, fitted, flared, pleated, gathered, asymmetric, or other stylized configuration. In an example, the fold over body portion 23 is configured to fold over an upper portion of a lower body garment to create a layered visual effect. The fold over body portion 23 may be formed from one or more fabric panels and may include seams, darts, pleats, lining layers, reinforcement features, and / or decorative details. The mini skirt fold over embodiment is provided by way of example only and is not limiting.

[0121] Corresponding Latching Elements. The insert portion 14 of the interchangeable fold over member 22 may include one or more corresponding latching elements 10 associated with the modular attachment system (FIGS. 27A-B). Releasable coupling at the engagement region 8 may be implemented according to different latching configuration families, including Example A and Example B, and the presence and placement of corresponding latching elements 10 may vary depending on the selected latching example.

[0122] In embodiments implementing an Example A latching configuration, the corresponding latching elements 10 are disposed on the insert portion 14 and are positioned to engage one or more latching elements 9 associated with the lower base undergarment 2 when the insert portion 14 is received within the insert-receiving channel 12. The corresponding latching elements 10 may be disposed on one flat side of the insert portion 14 or on both flat sides of the insert portion 14. The corresponding latching elements 10 may be arranged as a single latching location, a plurality of spaced latching locations, or a generally continuous latching strip extending along at least a portion of the insert portion 14.

[0123] In the hero embodiment, the corresponding latching elements 10 may be provided at a plurality of circumferential locations, including a front-center location, a back-center location, left and right side locations, and optionally additional locations spaced therebetween. The corresponding latching elements 10 may be implemented using any suitable releasable coupling structures, including hook-and-loop, hook-and-eye, snaps, clasps, buttons, magnets, and hybrid combinations thereof. The corresponding latching elements 10 may be secured to the insert portion 14 by any suitable technique, including stitching, bar-tacking, bonding, welding, capture within a seam, or combinations thereof.

[0124] In an example, the insert portion 14 may omit corresponding latching elements 10 and instead include one or more entry points 16 configured to cooperate with latching components associated with the lower base undergarment 2 when the insert portion 14 is seated within the insert-receiving channel 12.

[0125] Entry Points. In an example, the insert portion 14 of the interchangeable fold over member 22 includes one or more entry points 16 associated with the modular attachment system. The entry points 16 may be configured to cooperate with latching components associated with the lower base undergarment 2, for example in embodiments implementing an Example B latching configuration in which releasable engagement occurs while the insert portion 14 remains seated within the insert-receiving channel 12.

[0126] The entry points 16 may be positioned on one or both flat sides of the insert portion 14 or may extend through the thickness of the insert portion 14 at selected latching locations. The entry points 16 may be arranged as a single entry location, a plurality of spaced entry locations, or a pattern of entry locations corresponding to one or more engagement regions 8 of the lower base undergarment 2.

[0127] In the hero embodiment, the entry points 16 may be provided at a plurality of circumferential locations, including a front-center location, a back-center location, left and right side locations, and optionally additional locations spaced therebetween. Each entry point 16 may be configured as an opening, aperture, slit, notch, cut-out, reinforced hole, buttonhole-type opening, or other access feature sized and shaped to permit releasable engagement with a corresponding latching component associated with the lower base undergarment 2.

[0128] In an example, one or more entry points 16 may include reinforcement structures to resist stretching, fraying, or deformation during repeated use. The entry points 16 shown in connection with the hero embodiment are provided by way of example only and are not limiting.

[0129] Interchangeable Underlay Member Hero Embodiment—Medium-Length Button Down. The interchangeable member may be implemented as an interchangeable underlay member 24 configured to be releasably coupled to an upper base undergarment 19 and to extend downward beneath an upper body garment of the wearer so as to provide added coverage and / or a visible underlayer effect.

[0130] In the hero embodiment, the interchangeable underlay member 24 extends circumferentially as a continuous loop around the wearer during use and is configured to align with the band region 20 of the upper base undergarment 19. As shown in FIGS. 38A-B, the interchangeable underlay member 24 is implemented as a medium-length underlay in a button down-style silhouette and includes an underlay body portion 25 and an upper region defining an insert portion 14 configured to be removably received within the insert-receiving channel 12 of the upper base undergarment 19.

[0131] In an example, the insert portion 14 extends circumferentially around the interchangeable underlay member 24 and is dimensioned to be received between the inner flap 6 and the outer flap 7 within the insert-receiving channel 12. In an example, the insert portion 14 includes one or more engagement features, including one or more corresponding latching elements 10, one or more entry points 16, and / or a high-friction region 15.

[0132] The interchangeable underlay member 24 may be formed from any suitable textile material, including woven fabrics, knit fabrics, stretch knit fabrics, and combinations thereof. Representative examples include cotton / spandex blends, nylon / spandex blends, and other elastic or non-elastic textiles. Seams and finishes may include stitching, bonding, taping, or combinations thereof.

[0133] The interchangeable underlay member 24 includes a lower edge region defining a bottom perimeter of the member and an upper region transitioning into the insert portion 14. In an example, the lower edge region may be finished by a folded hem, bound edge, bonded edge, or combinations thereof.

[0134] Insert Portion. The insert portion 14 includes an upper portion of the interchangeable underlay member 24 and is configured to be removably received within the insert-receiving channel 12 of an upper base undergarment 19 (FIG. 38A). The insert portion 14 extends along an upper region of the interchangeable underlay member 24 and is dimensioned to be received between the inner flap 6 and the outer flap 7 within the insert-receiving channel 12.

[0135] The insert portion 14 includes opposing first 17 and second flat sides 18 defined by material layers in the insert portion 14 region. When the insert portion 14 is received within the insert-receiving channel 12, the first flat side 17 faces outward away from the wearer and the second flat side 18 faces inward toward the wearer such that the flat sides contact opposing surfaces of the inner flap 6 and the outer flap 7.

[0136] In an example, the insert portion 14 may include a high-friction region 15 disposed on one or both flat sides to increase frictional engagement within the insert-receiving channel 12. In embodiments implementing an Example A latching configuration, the insert portion 14 may include one or more corresponding latching elements 10 positioned to engage one or more latching elements 9 associated with the upper base undergarment 19. In embodiments implementing an Example B latching configuration, the insert portion 14 may include one or more entry points 16 configured to align with latching locations at the engagement region 8 and to permit releasable engagement between latching components associated with the upper base undergarment 19 while the insert portion 14 remains seated within the insert-receiving channel 12.

[0137] Underlay Body Portion. The underlay body portion 25 includes a visible body portion of the interchangeable underlay member 24 extending from the insert portion 14 and configured to extend downward from the upper base undergarment 19 during use. In the hero embodiment shown in FIGS. 38A-B, the underlay body portion 25 is implemented as a medium-length button-down-style portion that extends circumferentially around the wearer and hangs downward from the torso region when the insert portion 14 is received within the insert-receiving channel 12 of the upper base undergarment 19.

[0138] In an example, the underlay body portion 25 is configured to extend downward beneath an upper body garment of the wearer to provide a layered visual effect, additional coverage, and / or a selected garment appearance. The underlay body portion 25 may be shaped to provide a selected silhouette, including a straight, fitted, flared, draped, layered, curved, asymmetric, or other stylized configuration. The underlay body portion 25 may be formed from one or more fabric panels and may include seams, darts, pleats, collars, plackets, button structures, hems, lining layers, reinforcement features, and / or decorative details. The medium-length button-down-style underlay embodiment is provided by way of example only and is not limiting.

[0139] Corresponding Latching Elements. The insert portion 14 of the interchangeable underlay member 24 may include one or more corresponding latching elements 10 associated with the modular attachment system (FIG. 38A). Releasable coupling at the engagement region 8 may be implemented according to different latching configuration families, including Example A and Example B, and the presence and placement of corresponding latching elements 10 may vary depending on the selected latching example.

[0140] In embodiments implementing an Example A latching configuration, the corresponding latching elements 10 are disposed on the insert portion 14 and are positioned to engage one or more latching elements 9 associated with the upper base undergarment 19 when the insert portion 14 is received within the insert-receiving channel 12. The corresponding latching elements 10 may be disposed on one flat side of the insert portion 14 or on both flat sides of the insert portion 14. The corresponding latching elements 10 may be arranged as a single latching location, a plurality of spaced latching locations, or a generally continuous latching strip extending along at least a portion of the insert portion 14.

[0141] In the hero embodiment, the corresponding latching elements 10 may be provided at a plurality of circumferential locations, including a front-center location, a back-center location, left and right side locations, and optionally additional locations spaced therebetween. The corresponding latching elements 10 may be implemented using any suitable releasable coupling structures, including hook-and-loop, hook-and-eye, snaps, clasps, buttons, magnets, and hybrid combinations thereof. the corresponding latching elements 10 may be secured to the insert portion 14 by any suitable technique, including stitching, bar-tacking, bonding, welding, capture within a seam, or combinations thereof.

[0142] In an example, the insert portion 14 may omit corresponding latching elements 10 and instead include one or more entry points 16 configured to cooperate with latching components associated with the upper base undergarment 19 when the insert portion 14 is seated within the insert-receiving channel 12.

[0143] Entry Points. In an example, the insert portion 14 of the interchangeable underlay member 24 includes one or more entry points 16 associated with the modular attachment system. The entry points 16 may be configured to cooperate with latching components associated with the upper base undergarment 19, for example in embodiments implementing an Example B latching configuration in which releasable engagement occurs while the insert portion 14 remains seated within the insert-receiving channel 12.

[0144] The entry points 16 may be positioned on one or both flat sides of the insert portion 14 or may extend through the thickness of the insert portion 14 at selected latching locations. The entry points 16 may be arranged as a single entry location, a plurality of spaced entry locations, or a pattern of entry locations corresponding to one or more engagement regions 8 of the upper base undergarment 19.

[0145] In the hero embodiment, the entry points 16 may be provided at a plurality of circumferential locations, including a front-center location, a back-center location, left and right side locations, and optionally additional locations spaced therebetween. Each entry point 16 may be configured as an opening, aperture, slit, notch, cut-out, reinforced hole, buttonhole-type opening, or other access feature sized and shaped to permit releasable engagement with a corresponding latching component associated with the upper base undergarment 19.

[0146] In an example, one or more entry points 16 may include reinforcement structures to resist stretching, fraying, or deformation during repeated use. The entry points 16 shown in connection with the hero embodiment are provided by way of example only and are not limiting.

[0147] Interchangeable Tuck Away Member Hero Embodiment—Button Down. The interchangeable member may be implemented as an interchangeable tuck away member 26 including an upper body garment portion and an insert portion 14 configured for releasable coupling to a lower base undergarment 2 so as to retain at least a portion of the upper body garment portion in a tucked configuration during wear.

[0148] In the hero embodiment, the interchangeable tuck away member 26 extends circumferentially around at least a portion of the wearer during use and is configured to align with the waist region 3 of the lower base undergarment 2. As shown in FIGS. 42A-43, the interchangeable tuck away member 26 is implemented as a button down shirt and includes a tuck away body portion 27 and a lower region defining an insert portion 14 configured to be removably received within the insert-receiving channel 12 of the lower base undergarment 2.

[0149] In use, the lower base undergarment 2 is worn beneath a lower body garment, and the tuck away body portion 27 extends upward from the waist region such that at least a lower portion of the tuck away body portion 27 is retained in a tucked configuration relative to the lower base undergarment 2 during wear. In the illustrated hero embodiment, the tuck away body portion 27 extends upward along the torso of the wearer and is configured to present the appearance of a tucked button-down shirt.

[0150] In an example, the insert portion 14 extends circumferentially around the interchangeable tuck away member 26 and is dimensioned to be received between the inner flap 6 and the outer flap 7 within the insert-receiving channel 12. In an example, the insert portion 14 includes one or more engagement features, including one or more corresponding latching elements 10, one or more entry points 16, and / or a high-friction region 15.

[0151] The interchangeable tuck away member 26 may be formed from any suitable textile material, including woven fabrics, knit fabrics, stretch knit fabrics, and combinations thereof. Representative examples include cotton / spandex blends, nylon / spandex blends, and other elastic or non-elastic textiles. Seams and finishes may include stitching, bonding, taping, or combinations thereof.

[0152] The interchangeable tuck away member 26 includes an upper edge region defining an upper perimeter of the member and a lower region transitioning into the insert portion 14. In an example, the upper edge region may be finished in any suitable manner depending on the selected garment style, including a folded hem, bound edge, bonded edge, collar construction, neckline finish, or combinations thereof.

[0153] Insert Portion. The insert portion 14 includes a lower portion of the interchangeable tuck away member 26 and is configured to be removably received within the insert-receiving channel 12 of a lower base undergarment 2. The insert portion 14 extends circumferentially around the interchangeable tuck away member 26 and is dimensioned to be received between the inner flap 6 and the outer flap 7 within the insert-receiving channel 12.

[0154] As shown in FIGS. 42A-43, the insert portion 14 includes opposing first 17 and second flat sides 18 defined by material layers in the insert portion 14 region. When the insert portion 14 is received within the insert-receiving channel 12, the first flat side 17 faces outward away from the wearer and the second flat side 18 faces inward toward the wearer such that the flat sides contact opposing surfaces of the inner flap 6 and the outer flap 7.

[0155] In an example, the insert portion 14 may include a high-friction region 15 disposed on one or both flat sides to increase frictional engagement within the insert-receiving channel 12. In embodiments implementing an Example A latching configuration, the insert portion 14 may include one or more corresponding latching elements 10 positioned to engage one or more latching elements 9 associated with the lower base undergarment 2. In embodiments implementing an Example B latching configuration, the insert portion 14 may include one or more entry points 16 configured to align with latching locations at the engagement region 8 and to permit releasable engagement between latching components associated with the lower base undergarment 2 while the insert portion 14 remains seated within the insert-receiving channel 12.

[0156] Tuck Away Body Portion. The tuck away body portion 27 includes a visible body portion of the interchangeable tuck away member 26 extending from the insert portion 14 and configured to extend upward along at least a portion of the wearer's torso during use (FIGS. 42A-43). In the hero embodiment, the tuck away body portion 27 is implemented as a button down shirt-style portion that extends upward from the waist region when the insert portion 14 is received within the insert-receiving channel 12 of the lower base undergarment 2. In use, at least a lower portion of the tuck away body portion 27 is retained in a tucked configuration relative to the lower base undergarment 2 so as to maintain a selected tucked appearance during wear.

[0157] The tuck away body portion 27 may be shaped to provide a selected silhouette, including a straight, fitted, draped, relaxed, tailored, curved, asymmetric, or other stylized configuration. In an example, the tuck away body portion 27 is configured to extend upward from the lower base undergarment 2 to provide the appearance of a tucked upper body garment and / or to improve positional retention of the garment body during movement. The tuck away body portion 27 may be formed from one or more fabric panels and may include seams, darts, pleats, collars, plackets, button structures, cuffs, hems, sleeve portions, lining layers, reinforcement features, and / or decorative details. The button down shirt embodiment is provided by way of example only and is not limiting.

[0158] Corresponding Latching Elements. The insert portion 14 of the interchangeable tuck away member 26 may include one or more corresponding latching elements 10 associated with the modular attachment system (FIGS. 42A-43). Releasable coupling at the engagement region 8 may be implemented according to different latching configuration families, including Example A and Example B, and the presence and placement of corresponding latching elements 10 may vary depending on the selected latching example.

[0159] In embodiments implementing an Example A latching configuration, the corresponding latching elements 10 are disposed on the insert portion 14 and are positioned to engage one or more latching elements 9 associated with the lower base undergarment 2 when the insert portion 14 is received within the insert-receiving channel 12. The Corresponding latching elements 10 may be disposed on one flat side of the insert portion 14 or on both flat sides of the insert portion 14. The corresponding latching elements 10 may be arranged as a single latching location, a plurality of spaced latching locations, or a generally continuous latching strip extending along at least a portion of the insert portion 14.

[0160] In the hero embodiment, the corresponding latching elements 10 may be provided at a plurality of circumferential locations, including a front-center location, a back-center location, left and right side locations, and optionally additional locations spaced therebetween. The corresponding latching elements 10 may be implemented using any suitable releasable coupling structures, including hook-and-loop, hook-and-eye, snaps, clasps, buttons, magnets, and hybrid combinations thereof. The corresponding latching elements 10 may be secured to the insert portion 14 by any suitable technique, including stitching, bar-tacking, bonding, welding, capture within a seam, or combinations thereof.

[0161] In an example, the insert portion 14 may omit corresponding latching elements 10 and instead include one or more entry points 16 configured to cooperate with latching components associated with the lower base undergarment 2 when the insert portion 14 is seated within the insert-receiving channel 12.

[0162] Entry Points. In an example, the insert portion 14 of the interchangeable tuck away member 26 includes one or more entry points 16 associated with the modular attachment system. The entry points 16 may be configured to cooperate with latching components associated with the lower base undergarment 2, for example in embodiments implementing an Example B latching configuration in which releasable engagement occurs while the insert portion 14 remains seated within the insert-receiving channel 12.

[0163] The entry points 16 may be positioned on one or both flat sides of the insert portion 14 or may extend through the thickness of the insert portion 14 at selected latching locations. The entry points 16 may be arranged as a single entry location, a plurality of spaced entry locations, or a pattern of entry locations corresponding to one or more engagement regions 8 of the lower base undergarment 2.

[0164] In the hero embodiment, the entry points 16 may be provided at a plurality of circumferential locations, including a front-center location, a back-center location, left and right side locations, and optionally additional locations spaced therebetween. Each entry point 16 may be configured as an opening, aperture, slit, notch, cut-out, reinforced hole, buttonhole-type opening, or other access feature sized and shaped to permit releasable engagement with a corresponding latching component associated with the lower base undergarment 2.

[0165] In an example, one or more entry points 16 may include reinforcement structures to resist stretching, fraying, or deformation during repeated use. The entry points 16 shown in connection with the hero embodiment are provided by way of example only and are not limiting.Modular Attachment System.

[0166] System Overview. The modular attachment system is configured to releasably connect a base undergarment and an interchangeable member. The modular attachment system permits repeated attachment and detachment of an interchangeable member relative to a base undergarment over multiple attachment and detachment cycles. In the embodiments described herein, the modular attachment system is positioned at a designated interface region of the base undergarment and at a corresponding edge region of the interchangeable member, with the location of the modular attachment system varying according to the construction and intended pairing of the respective components.

[0167] The modular attachment system may be implemented across different disclosed embodiment pairings. In an assembled condition, an insert portion 14 of the interchangeable member is received within an insert-receiving channel 12 defined by channel-forming flaps 5 of the base undergarment so as to position the interchangeable member relative to the base undergarment at the interface (FIGS. 12A-B).

[0168] Retention may be provided by structural capture of the insert portion 14 within the insert-receiving channel 12, frictional engagement between interfacing components, releasable latching engagement at an engagement region 8, or combinations thereof. Releasable coupling may be implemented using different latching families, including Example A and Example B configurations described herein, while still permitting intentional manual release.

[0169] Embodiment Pairings & Interface Regions. The modular attachment system may be implemented across different compatible pairings of base undergarments and interchangeable members, with the location of the interface varying according to the construction and intended pairing of the respective components.

[0170] In embodiments including a lower base undergarment 2, the modular attachment system is positioned at a waist region 3 of the lower base undergarment 2 (FIGS. 2-7). In such embodiments, the corresponding interchangeable member may include an interface-defining region positioned at either a lower region or an upper region of the interchangeable member, depending on the particular member type. For example, the interchangeable waistband member 1 includes the modular attachment system at a lower region thereof, the interchangeable fold over member 22 includes the modular attachment system at an upper region thereof, and the interchangeable tuck away member 26 includes the modular attachment system at a lower region thereof. In an example, the interchangeable waistband member 1 may be permanently affixed to the lower base undergarment 2 at or adjacent to the engagement region 8 by stitching, bonding, welding, or another permanent attachment technique, such that the interchangeable waistband member 1 is fixed relative to the lower base undergarment 2 rather than removably coupled thereto (FIGS. 48A-B).

[0171] In embodiments including an upper base undergarment 19, the modular attachment system is positioned at a band region 20 of the upper base undergarment 19 (FIGS. 31A-34C). In such embodiments, the interchangeable underlay member 24 includes the modular attachment system at an upper region thereof for releasable coupling with the upper base undergarment 19.

[0172] Accordingly, the disclosed pairings are defined such that the interface region of each base undergarment corresponds to a compatible edge region of the associated interchangeable member. In this manner, the lower base undergarment 2 is configured for pairing with the interchangeable waistband member 1, the interchangeable fold over member 22, and the interchangeable tuck away member 26, while the upper base undergarment 19 is configured for pairing with the interchangeable underlay member 24.

[0173] Assembled Condition. In an assembled condition, the interchangeable member is attached to the base undergarment such that the respective components are positioned in operative relationship to one another at the modular attachment system (referring to hero embodiment examples, FIGS. 1A-D). In the assembled condition, an insert portion 14 of the interchangeable member is received within an insert-receiving channel 12 of the base undergarment, the insert-receiving channel 12 being defined by the channel-forming flaps 5 of the base undergarment. Receipt of the insert portion 14 within the insert-receiving channel 12 establishes positioning of the interchangeable member relative to the base undergarment and maintains alignment of the paired components at the interface during wear.

[0174] In an example, the assembled condition further includes releasable engagement at an engagement region 8 such that one or more latching-related components, friction-enhancing components, and / or structurally cooperating interface components act together to retain the interchangeable member relative to the base undergarment while still permitting intentional manual detachment. In the assembled condition, the interchangeable member and the base undergarment cooperate to present a selected aesthetic appearance, functional coverage arrangement, garment layering effect, and / or positional retention function, depending on the selected embodiment pairing.

[0175] The assembled condition shown in the drawings is illustrative only and is not limiting. For example, in some figures the assembled condition is shown using the lower base undergarment 2 and the interchangeable waistband member 1 hero embodiments (FIGS. 1A-D), although the same system principles may be implemented in other compatible pairings disclosed herein, including pairings of the Lower base undergarment 2 with an interchangeable fold over member 22 or an interchangeable tuck away member 26, and pairings of the upper base undergarment 19 with an interchangeable underlay member 24.

[0176] Detached Condition. In a detached condition, the interchangeable member is separated from the base undergarment such that the respective components are no longer coupled to one another at the modular attachment system. In the detached condition, the insert portion 14 of the interchangeable member is not received within the insert-receiving channel 12 of the base undergarment, and the base undergarment and the interchangeable member remain separate and independently positionable relative to one another.

[0177] Although the components are separated in the detached condition, the modular attachment system remains configured to permit subsequent alignment and reattachment of the interchangeable member relative to the base undergarment. For example, the insert portion 14 remains configured for subsequent insertion into the insert-receiving channel 12, and the interface components remain arranged such that the interchangeable member may later be repositioned into an assembled condition through a subsequent attachment sequence.

[0178] Closed Configuration. In a closed configuration, the outer flap 7 overlies the inner flap 6 such that the insert-receiving channel 12 is covered and at least partially enclosed (FIGS. 2-4, FIGS. 31A-C, and FIGS. 33A-C). In this configuration, the outer flap 7 is positioned relative to the inner flap 6 so as to restrict access to the opening region of the insert-receiving channel 12. The closed configuration may be maintained by the inherent positioning of the outer flap 7, by elastic recovery of one or more interface components, by engagement of latching-related components, or by combinations thereof.

[0179] When an insert portion 14 of an interchangeable member is received within the insert-receiving channel 12, the closed configuration may assist in retaining the insert portion 14 within the insert-receiving channel 12 during wear by maintaining coverage over the opening region and by preserving the positional relationship between the channel-forming flaps 5 and the insert portion 14. In an example, the closed configuration further places one or more interface components in aligned relationship at the engagement region 8 such that releasable latching may occur in this state when latching components are present.

[0180] Open Configuration. In an open configuration, the outer flap 7 is displaced relative to the inner flap 6 such that the opening region of the insert-receiving channel 12 is exposed (FIGS. 5-7, FIGS. 32A-C, and FIGS. 34A-C). In this configuration, the outer flap 7 is repositioned away from the inner flap 6, for example by folding, pivoting, or otherwise moving about a hinge zone 11, such that access is provided to the insert-receiving channel 12. The open configuration thereby permits insertion of the insert portion 14 into the insert-receiving channel 12 and withdrawal of the insert portion 14 from the insert-receiving channel 12.

[0181] The open configuration may be used during attachment of an interchangeable member to a base undergarment and during detachment of an interchangeable member from a base undergarment. In an example, the open configuration also exposes one or more interface components at or adjacent to the engagement region 8 so as to facilitate alignment, engagement, disengagement, inspection, or manual manipulation of the modular attachment system. Once insertion, withdrawal, or other intended manipulation has been completed, the outer flap 7 may be returned toward the inner flap 6 so that the modular attachment system transitions from the open configuration to the closed configuration.Channel-Forming Components.

[0182] Inner Flap. The modular attachment system includes an inner flap 6 positioned on a body-facing side of the base undergarment such that, in use, the inner flap 6 contacts the wearer's body (FIGS. 5-7, FIGS. 32A-C, and FIGS. 34A-C). The inner flap 6 is secured to the base undergarment along at least one attachment line at a designated interface region of the base undergarment, for example by stitching, bonding, capture within a seam, or combinations thereof. In an example, the inner flap 6 may be formed from an elastic material or elastic band construction and may optionally be wrapped in the same fabric as the base undergarment.

[0183] In an example, the inner flap 6 includes elastic reinforcement and is configured to lie flat against the wearer during use, thereby promoting conformability and reducing rolling, folding, or displacement of interface components. A channel-facing side of the inner flap 6 may optionally include a high-friction region 15 configured to increase frictional engagement with an insert portion 14 received within the insert-receiving channel 12. The inner flap 6 defines one side of the insert-receiving channel 12 and cooperates with the outer flap 7 to receive and retain the insert portion 14 of a compatible interchangeable member.

[0184] Outer Flap. The modular attachment system further includes an outer flap 7 positioned opposite the inner flap 6 and configured to move relative thereto between an open configuration and a closed configuration (FIGS. 2-7 and FIGS. 31A-34C). The outer flap 7 is arranged such that, in the closed configuration, the outer flap 7 overlies the inner flap 6 and covers at least a portion of the insert-receiving channel 12, while in the open configuration the outer flap 7 is displaced relative to the inner flap 6 to expose an opening region of the insert-receiving channel 12.

[0185] The outer flap 7 may be secured to the base undergarment along an attachment region that permits flap movement, as described further with respect to the hinge zone 11. In an example, the outer flap 7 may be formed from an elastic material or elastic band construction and may optionally be wrapped in the same fabric as the base undergarment. The outer flap 7 may further include a free edge positioned opposite the hinge zone 11, and the free edge may include a folded hem, a bound edge, a bonded edge, elastic reinforcement, tape reinforcement, or combinations thereof to maintain edge stability.

[0186] In an example, a channel-facing side of the outer flap 7 may include a high-friction region 15 configured to increase frictional engagement with the insert portion 14. The outer flap 7 defines an opposite side of the insert-receiving channel 12 and cooperates with the inner flap 6 to at least partially enclose the insert portion 14 when the modular attachment system is in the closed configuration.

[0187] Hinge Zone. The modular attachment system further includes a hinge zone 11 at which the outer flap 7 is attached relative to the base undergarment such that the outer flap 7 is movable relative to the inner flap 6 (FIGS. 5-7, FIGS. 32A-C and FIGS. 34A-C). The hinge zone 11 permits repositioning of the outer flap 7 between the open configuration and the closed configuration and thereby facilitates selective exposure and coverage of the insert-receiving channel 12.

[0188] The hinge zone 11 may be implemented in any suitable manner that permits repeated movement of the outer flap 7 relative to the inner flap 6 over multiple attachment and detachment cycles. By way of example and not limitation, the hinge zone 11 may be formed by a fold over construction, a stitched hinge seam, a bonded hinge line, an elastic hinge tape, or combinations thereof. In an example, the hinge zone 11 may be integrated into an elastic band structure, a folded material region, a seam-defined transition region, or another flexible attachment region configured to permit movement of the outer flap 7 while maintaining attachment to the base undergarment.

[0189] Insert-Receiving Channel. The insert-receiving channel 12 is defined as a space between the inner flap 6 and the outer flap 7 of the base undergarment and is configured to removably receive an insert portion 14 of an interchangeable member (FIGS. 5-7, FIGS. 32A-C and FIGS. 34A-C). The insert-receiving channel 12 includes an opening region through which the insert portion 14 may be inserted into and withdrawn from the insert-receiving channel 12 during attachment and detachment of the interchangeable member relative to the base undergarment.

[0190] In different embodiments, the insert-receiving channel 12 may extend around at least a portion of a selected interface region of the base undergarment, including at least a portion of a waist region 3 of a lower base undergarment 2 or at least a portion of a band region 20 of an upper base undergarment 19. The insert-receiving channel 12 has a height and a depth sized to receive the insert portion 14 while permitting insertion, seating, and retention thereof within the modular attachment system.

[0191] When the insert portion 14 is received within the insert-receiving channel 12, contact between the insert portion 14 and opposing channel-forming surfaces of the inner flap 6 and the outer flap 7 may contribute to retention of the insert portion 14 within the modular attachment system during wear. In an example, elastic tension, material recovery, and / or conforming contact within the insert-receiving channel 12 may further increase retention by resisting relative movement of the insert portion 14 after insertion.

[0192] Insert Portion. The insert portion 14 is a portion of the interchangeable member configured to be received within the insert-receiving channel 12 of the base undergarment and to participate in releasable coupling of the interchangeable member to the base undergarment (FIGS. 8-10, FIGS. 27A-B, FIG. 38A and FIGS. 42A-C). The location of the insert portion 14 may vary depending on the type of interchangeable member. In an example, the insert portion 14 is located at a lower region of the interchangeable member, for example in an interchangeable waistband member 1 or an interchangeable tuck away member 26. In other embodiments, the insert portion 14 is located at an upper region of the interchangeable member, for example in an interchangeable fold over member 22 or an interchangeable underlay member 24.

[0193] The insert portion 14 may include opposing first 17 and second flat sides 18 defined by material layers in the insert portion 14 region. When the insert portion 14 is received within the insert-receiving channel 12, the opposing flat sides are positioned to contact opposing surfaces of the inner flap 6 and the outer flap 7. In this manner, the insert portion 14 functions as the portion of the interchangeable member that is insertable into, removable from, and retainable within the modular attachment system.

[0194] In an example, the insert portion 14 may further include one or more corresponding latching elements 10, one or more entry points 16, a high-friction region 15, or combinations thereof. The particular features present on the insert portion 14 may vary depending on the selected latching example, desired retention characteristics, and the construction of the associated interchangeable member.

[0195] Engagement Region. As used herein, an engagement region 8 refers to a designated region of the modular attachment system at which engagement, alignment, and / or retention between components occurs during use (FIGS. 14C-F, FIGS. 30D-H, FIGS. 41C-F and FIGS. 47C-G). The engagement region 8 is defined relative to the base undergarment and serves as a consistent interface reference for identifying where releasable coupling and associated component interaction occur.

[0196] In a closed configuration, the engagement region 8 may include one or more overlapping, aligned, and / or adjacent interface components, including portions of the inner flap 6, the outer flap 7, and the insert portion 14, and may further include one or more latching-related components where releasable coupling occurs. In an open configuration, the engagement region 8 continues to refer to the same general interface location even though the outer flap 7 has been displaced relative to the inner flap 6, and may thereby serve as a reference region for insertion, alignment, latching, unlatching, and other interface interactions. In a detached condition, the engagement region 8 remains defined relative to the base undergarment even though the interchangeable member is separated from the base undergarment and the insert portion 14 is not received within the insert-receiving channel 12.

[0197] High-Friction Region. In an example, a high-friction region 15 may be provided as an optional feature of the modular attachment system to increase frictional engagement between interfacing components (FIG. 11). The high-friction region 15 may be disposed on one or both flat sides of the insert portion 14, on a channel-facing side of the inner flap 6, on a channel-facing side of the outer flap 7, or on any combination thereof.

[0198] When present, the high-friction region 15 is configured to increase frictional engagement between the insert portion 14 and one or more opposing surfaces within the insert-receiving channel 12, thereby helping to resist relative sliding, shifting, and / or withdrawal of the insert portion 14 during wear. In an example, the high-friction region 15 acts in combination with structural capture and / or releasable latching to improve retention of the interchangeable member relative to the base undergarment.

[0199] The high-friction region 15 may be implemented in any suitable manner, including printed elastomer features, silicone features, a textured coating, a friction-enhancing film, a grippy tape, a high-friction textile structure, or combinations thereof.

[0200] In an example, the high-friction region 15 may extend continuously along one or more portions of the insert portion 14, the inner flap 6, and / or the outer flap 7. In other embodiments, the high-friction region 15 may be localized to selected regions of the interface. In still other embodiments, the high-friction region 15 may be omitted where sufficient retention is provided by other aspects of the modular attachment system.

[0201] Retention Mechanisms. Retention of an interchangeable member relative to a base undergarment may be achieved in any suitable manner within the modular attachment system, including structural retention, frictional retention, latching retention, or combinations thereof. The particular retention mechanism or combination of mechanisms may vary depending on the embodiment pairing, material construction, and selected interface features.

[0202] Structural retention may be provided by physical capture of the insert portion 14 within the insert-receiving channel 12. For example, opposing channel-forming surfaces of the inner flap 6 and the outer flap 7 may constrain the insert portion 14 when it is received within the insert-receiving channel 12, thereby resisting displacement and maintaining positional alignment during wearer movement.

[0203] Frictional retention may be provided by contact pressure between the insert portion 14 and the channel-forming surfaces of the inner flap 6 and the outer flap 7, optionally enhanced by one or more high-friction regions 15. Such frictional retention may resist relative sliding or withdrawal of the insert portion 14 within the insert-receiving channel 12 during use.

[0204] Latching retention may be provided by engagement of one or more latching components at the engagement region 8, including direct engagement between mating latching components or engagement through one or more entry points 16 depending on the selected latching example. In an example, the modular attachment system may employ multiple retention mechanisms simultaneously such that structural retention, frictional retention, and latching retention collectively contribute to maintaining the interchangeable member in a selected position relative to the base undergarment during wear.Latching Configurations.

[0205] Example A. In embodiments implementing this example latching configuration, releasable coupling is achieved through direct engagement between one or more latching elements 9 associated with the base undergarment and one or more corresponding latching elements 10 associated with the insert portion 14 of the interchangeable member (FIGS. 14A-141). In such embodiments, the latching elements 9 and the corresponding latching elements 10 are configured to mate directly with one another at one or more locations of the engagement region 8 when the insert portion 14 is received within the insert-receiving channel 12.

[0206] The latching elements 9 associated with the base undergarment may be positioned at any suitable locations, including front-center, back-center, side locations, or other spaced locations along the relevant interface region. Similarly, the corresponding latching elements 10 associated with the insert portion 14 may be positioned at corresponding locations such that direct mating engagement occurs when the paired components are aligned and assembled.

[0207] The latching elements 9 and corresponding latching elements 10 of an Example A configuration may be implemented using any suitable releasable coupling structures, including buttons, snaps, hook-and-loop structures, hook-and-eye structures, clasps, magnets, and hybrid combinations thereof (FIGS. 13A-J). Any latching structure shown in the drawings is provided by way of example only and is not limiting.

[0208] Example B. In embodiments implementing this example latching configuration, releasable coupling occurs while the insert portion 14 remains seated within the insert-receiving channel 12 (FIGS. 16A-I). In such embodiments, the insert portion 14 includes one or more entry points 16 aligned at the engagement region 8 with one or more latching elements 9 associated with the base undergarment. As the outer flap 7 is moved toward the closed configuration, one or more corresponding latching elements 10 associated with the outer flap 7 engage the one or more latching elements 9 through the one or more entry points 16, thereby releasably coupling the interchangeable member to the base undergarment.

[0209] The one or more latching elements 9 may be positioned at any suitable locations along the relevant interface region, including front-center, back-center, side locations, or other spaced locations. In an example, the one or more latching elements 9 are disposed on the inner flap 6 and the one or more corresponding latching elements 10 are disposed on the outer flap 7.

[0210] The one or more entry points 16 may be configured as openings, slits, cut-outs, apertures, notches, reinforced holes, buttonhole-type openings, or other access features sized and shaped to permit releasable engagement through the insert portion 14 while the insert portion 14 remains received within the insert-receiving channel 12. In an example, one or more entry points 16 may include reinforcement structures configured to resist stretching, deformation, fraying, or wear over repeated use.

[0211] The latching components of an Example B configuration may be implemented using any suitable releasable coupling structures, including buttons, snaps, key-and-keyhole structures, hooking structures, clasping structures, magnets, and hybrid combinations thereof (FIGS. 15A-C). Any Example B arrangement shown in the drawings is provided by way of example only and is not limiting.Attachment & Detachment Sequences.

[0212] General Attachment & Detachment Sequence. Attachment of an interchangeable member to a base undergarment may be carried out by first moving the outer flap 7 to the open configuration so as to expose the opening region of the insert-receiving channel 12. The insert portion 14 of the interchangeable member may then be aligned with the insert-receiving channel 12 and inserted into the insert-receiving channel 12 through the opening region. After insertion, the insert portion 14 may be advanced and seated within the insert-receiving channel 12 such that the interface components are aligned at the engagement region 8.

[0213] Where latching components are present, attachment may further include engaging one or more latching-related components at the engagement region 8. Thereafter, where applicable, the outer flap 7 may be returned toward the inner flap 6 so that the modular attachment system transitions to the closed configuration and the insert portion 14 is covered and retained within the insert-receiving channel 12.

[0214] Detachment of the interchangeable member from the base undergarment may be carried out by first moving the outer flap 7 to the open configuration, where needed, to expose the opening region of the insert-receiving channel 12. Where latching components are present, detachment may further include disengaging the latching-related components at the engagement region 8. The insert portion 14 may then be withdrawn from the insert-receiving channel 12 through the opening region, thereby separating the interchangeable member from the base undergarment and returning the modular attachment system to a detached condition.

[0215] Representative Sequence: Lower Base Undergarment & Interchangeable Waistband Member (Example A). A representative attachment and detachment sequence for the hero embodiments of the lower base undergarment 2 and the interchangeable waistband member 1 in an Example A latching configuration is shown in FIGS. 14A-I. In this sequence, the interchangeable waistband member 1 is releasably coupled to the lower base undergarment 2 by direct engagement between one or more latching elements 9 of the lower base undergarment 2 and one or more corresponding latching elements 10 of the insert portion 14 while the insert portion 14 is received within the insert-receiving channel 12.

[0216] Attachment may begin with the components separate and the lower base undergarment 2 in the closed configuration, as shown in FIG. 14A. The outer flap 7 may be moved about the hinge zone 11 to expose the opening region of the insert-receiving channel 12, as shown in FIG. 14B. The insert portion 14 may then be aligned with and inserted into the insert-receiving channel 12 so as to become seated therein, with the corresponding latching elements 10 aligned for direct engagement with the latching elements 9, as shown in FIG. 14C. As shown in FIGS. 14D-E, direct mating engagement may occur at a plurality of circumferential locations of the engagement region 8.

[0217] Once the insert portion 14 is seated and the Example A latching components are engaged, the outer flap 7 may be returned toward the closed configuration, as shown in FIG. 14F. The attached condition is shown in FIGS. 14G-I, in which the insert portion 14 remains seated, the corresponding latching elements 10 remain engaged with the latching elements 9, and the outer flap 7 overlies the opening region to cover and at least partially enclose the interface.

[0218] Detachment may be carried out by reversing the foregoing sequence, including moving the outer flap 7 to the open configuration, disengaging the latching elements 9 and corresponding latching elements 10, and withdrawing the insert portion 14 from the insert-receiving channel 12.

[0219] Representative Sequence: Lower Base Undergarment & Interchangeable Waistband Member (Example B). A representative attachment and detachment sequence for the hero embodiments of the lower base undergarment and the interchangeable waistband member 1 in an Example B latching configuration is shown in FIGS. 16A-I. In this sequence, the interchangeable waistband member 1 is releasably coupled to the lower base undergarment 2 while the insert portion 14 remains seated within the insert-receiving channel 12, with one or more entry points 16 aligned with one or more latching elements 9 and with releasable engagement occurring at the engagement region 8 as the outer flap 7 is repositioned toward the closed configuration.

[0220] Attachment may begin with the components separate and the lower base undergarment 2 in the closed configuration, as shown in FIG. 16A. The outer flap 7 may then be moved about the hinge zone 11 to expose the opening region of the insert-receiving channel 12, as shown in FIG. 16B. The insert portion 14 may be aligned with and inserted into the insert-receiving channel 12 so as to become seated therein, with the entry points 16 registered with the latching elements 9, as shown in FIGS. 16C-D. As shown in FIG. 16E, once the insert portion 14 is seated, the outer flap 7 may be repositioned such that at least one corresponding latching element 10 associated with the outer flap 7 releasably engages at least one registered latching element 9 at the engagement region 8. The outer flap 7 may then continue toward the closed configuration, as shown in FIG. 16F.

[0221] The attached condition is shown in FIGS. 16G-I, in which the insert portion 14 remains seated within the insert-receiving channel 12, the outer flap 7 overlies the opening region, and releasable engagement has occurred through the Example B arrangement at the engagement region 8.

[0222] Detachment may be carried out by reversing the foregoing sequence, including moving the outer flap 7 away from the inner flap 6 to expose the interface, disengaging the Example B latching arrangement, and withdrawing the insert portion 14 from the insert-receiving channel 12.

[0223] Representative Sequence: Lower Base Undergarment & Interchangeable Fold Over Member. A representative attachment and detachment sequence for the hero embodiments of the lower base undergarment 2 and the interchangeable fold over member 22 in an Example B latching configuration is shown in FIGS. 30A-L. In this sequence, the interchangeable fold over member 22 is releasably coupled to the lower base undergarment 2 while the insert portion 14 remains seated within the insert-receiving channel 12, with one or more entry points 16 aligned with one or more latching elements 9 and with releasable engagement occurring at the engagement region 8 as the outer flap 7 is repositioned toward the closed configuration.

[0224] Attachment may begin with the wearer wearing the lower base undergarment 2 in the closed configuration, as shown in FIG. 30A. The outer flap 7 may be moved about the hinge zone 11 to expose the opening region of the insert-receiving channel 12 and the latching components, as shown in FIG. 30B. The interchangeable fold over member 22 may then be positioned with the insert portion 14 aligned with the insert-receiving channel 12 and the entry points 16 aligned for registration with the latching elements 9, while the wearer holds the fold over body portion 23 upward to access the waist interface, as shown in FIG. 30C. The insert portion 14 may then be inserted and seated within the insert-receiving channel 12, with the entry points 16 registered with the latching elements 9 at the engagement region 8, as shown in FIGS. 30D-E. As shown in FIG. 30F, the outer flap 7 may then be repositioned so that the Example B latching arrangement engages at the engagement region 8.

[0225] The attached waist-interface condition is shown in FIGS. 30G-H. After attachment, a lower body garment may be worn over the lower base undergarment 2, as shown in FIG. 301, and the fold over body portion 23 may then be folded downward over an upper portion of the lower body garment, as shown in FIG. 30J. The fully assembled condition is shown in FIGS. 30K-L, in which the fold over body portion 23 is folded over and positioned externally on the lower body garment.

[0226] Detachment may be carried out by reversing the foregoing sequence, including lifting the fold over body portion 23 to access the waist interface, moving the outer flap 7 to expose the interface and disengage the Example B latching arrangement, and withdrawing the insert portion 14 from the insert-receiving channel 12.

[0227] Representative Sequence: Upper Base Undergarment & Interchangeable Underlay Member. A representative attachment and detachment sequence for the hero embodiments of the upper base undergarment 19 and the interchangeable underlay member 24 in an Example A latching configuration is shown in FIGS. 41A-J. In this sequence, the interchangeable underlay member 24 is releasably coupled to the upper base undergarment 19 by direct engagement between one or more latching elements 9 of the upper base undergarment 19 and one or more corresponding latching elements 10 of the insert portion 14 while the insert portion 14 is received within the insert-receiving channel 12.

[0228] Attachment may begin with the upper base undergarment 19 in the closed configuration, as shown in FIG. 41A. The outer flap 7 may be moved about the hinge zone 11 to expose the opening region of the insert-receiving channel 12, as shown in FIG. 41B. The interchangeable underlay member 24 may then be positioned adjacent to the band region 20 with the insert portion 14 aligned with the insert-receiving channel 12 and the corresponding latching elements 10 aligned for direct engagement with the latching elements 9. The insert portion 14 may then be inserted into and seated within the insert-receiving channel 12 at the engagement region 8, as shown in FIG. 41C. As shown in FIGS. 41D-E, direct mating engagement of the Example A latching components may occur at a plurality of circumferential locations.

[0229] Once the insert portion 14 is seated and the latching components are engaged, the outer flap 7 may be returned toward the closed configuration, as shown in FIG. 41F. The attached condition is shown in FIGS. 41G-H, in which the insert portion 14 remains seated, the corresponding latching elements 10 remain engaged with the latching elements 9, and the outer flap 7 overlies the opening region to cover and at least partially enclose the interface. As shown in FIGS. 41I-J, an upper body garment may then be worn over the upper base undergarment 19 and an upper region of the underlay body portion 25 so that the interchangeable underlay member 24 extends downward beneath the upper body garment.

[0230] Detachment may be carried out by reversing the foregoing sequence, including lifting or removing any upper body garment as needed to access the band-region interface, moving the outer flap 7 to the open configuration, disengaging the latching elements 9 and corresponding latching elements 10, and withdrawing the insert portion 14 from the insert-receiving channel 12.

[0231] Representative Sequence: Lower Base Undergarment & Interchangeable Tuck Away Member. A representative attachment and detachment sequence for another example of the lower base undergarment 2 configured as a trunk silhouette and the hero embodiment of the interchangeable tuck away member 26 in an Example A latching configuration is shown in FIGS. 47A-K. In this sequence, the interchangeable tuck away member 26 is releasably coupled to the lower base undergarment 2 by direct engagement between one or more latching elements 9 of the lower base undergarment 2 and one or more corresponding latching elements 10 of the insert portion 14 while the insert portion 14 is received within the insert-receiving channel 12.

[0232] Attachment may begin with the lower base undergarment 2 in the closed configuration, as shown in FIG. 47A. The outer flap 7 may then be moved about the hinge zone 11 to expose the opening region of the insert-receiving channel 12 and the latching elements 9 on the inner flap 6, as shown in FIG. 47B. The interchangeable tuck away member 26 may then be positioned such that the insert portion 14 is inserted into and seated within the insert-receiving channel 12, with the corresponding latching elements 10 aligned for direct engagement with the latching elements 9 at the engagement region 8, as shown in FIG. 47C. As shown in FIGS. 47D-F, direct mating engagement of the Example A latching components may occur at one or more locations along the engagement region 8.

[0233] Once the insert portion 14 is seated and the latching components are engaged, the outer flap 7 may be returned toward the closed configuration, as shown in FIG. 47G. The attached condition is shown in FIGS. 47H-I, in which the Insert Portion 14 remains seated, the corresponding latching elements 10 remain engaged with the latching elements 9, and the outer flap 7 overlies the opening region to cover and at least partially enclose the interface. As shown in FIGS. 47J-K, a lower body garment may then be worn over the lower base undergarment 2 while the tuck away body portion 27 remains visible above the lower body garment so as to provide the appearance and / or function of a tucked upper body garment.

[0234] Detachment may be carried out by reversing the foregoing sequence, including adjusting any lower body garment as needed to access the waist-region interface, moving the outer flap 7 to the open configuration, disengaging the latching elements 9 and corresponding latching elements 10, and withdrawing the insert portion 14 from the insert-receiving channel 12.

[0235] Other Examples. The modular attachment system is described herein with reference to multiple embodiments to illustrate representative implementations of the base undergarment and the interchangeable member and to demonstrate interchangeability of the separable components.

[0236] The disclosed embodiments show that the base undergarment and the interchangeable member may be implemented in different silhouettes, materials, and external geometries while remaining compatible through the same modular attachment system. This permits a wearer to selectively couple a chosen interchangeable member to a compatible base undergarment and to replace that interchangeable member with another through repeated attachment and detachment cycles. Any base undergarment variant and any interchangeable member variant may be configured for an Example A latching configuration, an Example B latching configuration, or both, depending on the selected interface arrangement.

[0237] Lower Base Undergarment Variants. Each lower base undergarment 2 variant may include an inner flap 6, an outer flap 7, and an insert-receiving channel 12 defined therebetween. In an example, a high-friction region 15 may be disposed on a channel-facing side of the inner flap 6 and / or the outer flap 7, and in other embodiments the high-friction region 15 may be omitted.

[0238] Each lower base undergarment 2 variant may further include one or more latching elements 9 arranged according to an Example A latching configuration, an Example B latching configuration, or both, as described herein.

[0239] Thong. In another example, the lower base undergarment 2 is configured as a thong silhouette, as shown in FIGS. 17A-B. The thong embodiment provides reduced rear coverage with a narrow rear portion and leg openings configured for reduced material coverage along the buttock region relative to the boyshort hero embodiment. The waist-region interface portion of the modular attachment system may be substantially the same as described for the hero embodiment, with minor proportional adjustments to accommodate the thong silhouette while maintaining compatibility with an interchangeable member.

[0240] Cheeky. In another example, the lower base undergarment 2 is configured as a cheeky silhouette, as shown in FIGS. 18A-B. The cheeky embodiment provides reduced lower-body coverage with higher-cut leg openings and a reduced seat coverage profile relative to the boyshort hero embodiment. The waist-region interface portion of the modular attachment system may be substantially the same as described for the hero embodiment, with minor proportional adjustments to accommodate the cheeky silhouette while maintaining compatibility with an interchangeable member.

[0241] Brief. In another example, the lower base undergarment 2 is configured as a brief silhouette, as shown in FIGS. 19A-B. The brief embodiment provides a higher leg opening and a front coverage profile suitable for a male wearer, with a reduced leg length relative to trunk and boxer brief silhouettes. The waist-region interface portion of the modular attachment system may be substantially the same as described for the hero embodiment, with minor proportional adjustments to accommodate the brief silhouette while maintaining compatibility with an interchangeable member.

[0242] Trunk. In another example, the lower base undergarment 2 is configured as a trunk silhouette, as shown in FIGS. 20A-B. The trunk embodiment provides increased leg length and a lower leg opening position relative to the brief embodiment, with a generally straight leg opening profile extending partially down the upper thigh. The waist-region interface portion of the modular attachment system may be substantially the same as described for the hero embodiment, with minor proportional adjustments to accommodate the trunk silhouette while maintaining compatibility with an interchangeable member.

[0243] Boxer Brief. In another example, the lower base undergarment 2 is configured as a boxer brief silhouette, as shown in FIGS. 21A-B. The boxer brief embodiment provides further increased leg length and extended lower-body coverage down the thigh relative to the trunk embodiment. The waist-region interface portion of the modular attachment system may be substantially the same as described for the hero embodiment, with minor proportional adjustments to accommodate the boxer brief silhouette while maintaining compatibility with an interchangeable member.

[0244] Upper Base Undergarment Variants. Each upper base undergarment 19 variant may include an inner flap 6, an outer flap 7, and an insert-receiving channel 12 defined therebetween. In an example, a high-friction region 15 may be disposed on a channel-facing side of the inner flap 6 and / or the outer flap 7, and in other embodiments the high-friction region 15 may be omitted.

[0245] Each upper base undergarment 19 variant may further include one or more latching elements 9 arranged according to an Example A latching configuration, an Example B latching configuration, or both, as described herein.

[0246] Underwire Bra. In another example, the upper base undergarment 19 is configured as an underwire bra silhouette, as shown in FIGS. 35A-B. The underwire bra embodiment provides a more structured upper-body garment configuration than the bralette hero embodiment, including chest-covering portions shaped to define respective cups, one or more underwire support elements extending along lower regions of the cups, and a central front region positioned between the cups. In an example, the underwire bra embodiment may further include adjustable strap portions and a rear closure structure. The band-region interface portion of the modular attachment system may be substantially the same as described for the bralette hero embodiment, with minor proportional, structural, or contouring adjustments to accommodate the underwire bra silhouette while maintaining compatibility with an interchangeable member.

[0247] Sports Bra. In another example, the upper base undergarment 19 is configured as a sports bra silhouette, as shown in FIGS. 36A-B. The sports bra embodiment provides a different upper-body garment configuration from the bralette hero embodiment, including chest-covering portions extending across a greater area of the upper torso, strap portions having increased width, and side and rear regions configured to provide increased support and positional retention during wear. In an example, the sports bra embodiment may further include one or more lining layers, support layers, compression fabrics, reinforced panel regions, and / or elasticized edge constructions. The band-region interface portion of the modular attachment system may be substantially the same as described for the bralette hero embodiment, with minor proportional, structural, or contouring adjustments to accommodate the sports bra silhouette while maintaining compatibility with an interchangeable member.

[0248] Bandeau. In another example, the upper base undergarment 19 is configured as a bandeau silhouette, as shown in FIGS. 37A-B. The bandeau embodiment provides a different upper-body garment configuration from the bralette hero embodiment, including chest-covering portions extending across the front of the wearer without strap portions. In an example, the bandeau embodiment may further include one or more support elements, lining layers, molded structures, and / or internal reinforcement features. The band-region interface portion of the modular attachment system may be substantially the same as described for the bralette hero embodiment, with minor proportional, structural, or contouring adjustments to accommodate the bandeau silhouette while maintaining compatibility with an interchangeable member.

[0249] Interchangeable Waistband Member Variants. Each interchangeable waistband member 1 variant defines an insert portion 14 along a lower region configured to be received within the insert-receiving channel 12 and may include a high-friction region 15 on one or both flat sides of the insert portion 14, or may omit the high-friction region 15.

[0250] Each variant may include one or more corresponding latching elements 10 and / or one or more entry points 16 arranged according to an Example A latching configuration, an Example B latching configuration, or both, as described herein.

[0251] Jean. In another example, the interchangeable waistband member 1 is configured as a jean waistband, as shown in FIGS. 22A-B. The jean waistband variant includes a waistband body portion 13 shaped to present a jean-style upper geometry relative to the sweatpant hero embodiment. In an example, this variant may include a zipper structure, button structure, pocket structure, belt-loop structure, or combinations thereof positioned along the waistband body portion 13.

[0252] Trouser. In another example, the interchangeable waistband member 1 is configured as a trouser waistband, as shown in FIGS. 23A-B. The trouser waistband variant includes a waistband body portion 13 shaped to present a trouser-style upper geometry relative to the sweatpant hero embodiment. In an example, this variant may include a zipper structure, pocket structure, pleat-simulating structure, or other tailored waistband detail.

[0253] Basketball Short. In another example, the interchangeable waistband member 1 is configured as a basketball-short waistband, as shown in FIGS. 24A-B. The basketball-short waistband variant includes a waistband body portion 13 shaped to present a basketball-short-style upper geometry relative to the sweatpant hero embodiment.

[0254] Traditional Boxer. In another example, the interchangeable waistband member 1 is configured as a traditional woven boxer waistband, as shown in FIGS. 25A-B. The traditional boxer waistband variant includes a waistband body portion 13 shaped to present a traditional boxer-style upper geometry relative to the sweatpant hero embodiment.

[0255] Bloomer. In another example, the interchangeable waistband member 1 is configured as a bloomer waistband, as shown in FIGS. 26A-B. The bloomer waistband variant includes a waistband body portion 13 shaped to present a bloomer-style upper geometry relative to the sweatpant hero embodiment.

[0256] Interchangeable Fold Over Member Variants. Each interchangeable fold over member 22 variant defines an insert portion 14 along an upper region configured to be received within the insert-receiving channel 12 and may include a high-friction region 15 on one or both flat sides of the insert portion 14, or may omit the high-friction region 15.

[0257] Each variant may include one or more corresponding latching elements 10 and / or one or more entry points 16 arranged according to an Example A latching configuration, an Example B latching configuration, or both, as described herein.

[0258] Midi Skirt. In another example, the interchangeable fold over member 22 is configured as a midi skirt fold over member, as shown in FIGS. 28A-D. The midi skirt fold over variant includes a fold over body portion 23 shaped to present a skirt-style geometry. In use, the fold over body portion 23 is positioned externally relative to a lower body garment such that the fold over body portion 23 overlies an upper portion of the lower body garment. In the midi skirt fold over variant, the fold over body portion 23 extends downward to end at or near a knee region of the wearer.

[0259] Maxi Skirt. In another example, the interchangeable fold over member 22 is configured as a maxi skirt fold over member, as shown in FIGS. 29A-D. The maxi skirt fold over variant includes a fold over body portion 23 shaped to present a skirt-style geometry. In use, the fold over body portion 23 is positioned externally relative to a lower body garment such that the fold over body portion 23 overlies an upper portion of the lower body garment. In the maxi skirt fold over variant, the fold over body portion 23 extends downward to end at or near an ankle region of the wearer.

[0260] Interchangeable Underlay Member Variants. Each interchangeable underlay member 24 variant defines an insert portion 14 along an upper region configured to be received within the insert-receiving channel 12 and may include a high-friction region 15 on one or both flat sides of the insert portion 14, or may omit the high-friction region 15.

[0261] Each variant may include one or more corresponding latching elements 10 and / or one or more entry points 16 arranged according to an Example A latching configuration, an Example B latching configuration, or both, as described herein.

[0262] Short-Length Tank. In another example, the interchangeable underlay member 24 is configured as a short-length underlay in a tank-top-style silhouette, as shown in FIGS. 39A-B. The short-length tank underlay variant includes an underlay body portion 25 shaped to present a tank-top-style geometry. In use, an upper base undergarment 19 is worn beneath an upper body garment, and a portion of the underlay body portion 25 is positioned externally of a lower portion of the upper body garment such that the underlay body portion 25 extends downward beyond the upper body garment. In the short-length tank underlay variant, the underlay body portion 25 extends downward to end at or near a waist region of the wearer.

[0263] Long-Length Lace. In another example, the interchangeable underlay member 24 is configured as a long-length underlay in a lace-style silhouette, as shown in FIGS. 40A-B. The long-length lace underlay variant includes an underlay body portion 25 shaped to present a lace-style geometry. In use, an upper base undergarment 19 is worn beneath an upper body garment, and a portion of the underlay body portion 25 is positioned externally of a lower portion of the upper body garment such that the underlay body portion 25 extends downward beyond the upper body garment. In the long-length lace underlay variant, the underlay body portion 25 extends downward to end at or near a lower leg region of the wearer.

[0264] Interchangeable Tuck Away Member Variants. Each interchangeable tuck away member 26 variant defines an insert portion 14 along a lower region configured to be received within the insert-receiving channel 12 and may include a high-friction region 15 on one or both flat sides of the insert portion 14, or may omit the high-friction region 15.

[0265] Each variant may include one or more corresponding latching elements 10 and / or one or more entry points 16 arranged according to an Example A latching configuration, an Example B latching configuration, or both, as described herein.

[0266] Tank Top. In another example, the interchangeable tuck away member 26 is configured as a tank-top-style tuck away member, as shown in FIGS. 44A-B. The tank-top-style tuck away variant includes a tuck away body portion 27 shaped to present a tank-top-style geometry. In use, the tuck away body portion 27 extends upward from the waist region 3 of a lower base undergarment 2 and is retained relative thereto so as to provide the appearance and / or function of a tucked tank top during wear.

[0267] T-Shirt. In another example, the interchangeable tuck away member 26 is configured as a t-shirt-style tuck away member, as shown in FIGS. 45A-B. The t-shirt-style tuck away variant includes a tuck away body portion 27 shaped to present a t-shirt-style geometry. In use, the tuck away body portion 27 extends upward from the waist region 3 of a lower base undergarment 2 and is retained relative thereto so as to provide the appearance and / or function of a tucked t-shirt during wear.

[0268] Long Sleeve Shirt. In another example, the interchangeable tuck away member 26 is configured as a long-sleeve-shirt-style tuck away member, as shown in FIGS. 46A-B. The long-sleeve-shirt-style tuck away variant includes a tuck away body portion 27 shaped to present a long-sleeve-shirt-style geometry. In use, the tuck away body portion 27 extends upward from the waist region 3 of a lower base undergarment 2 and is retained relative thereto so as to provide the appearance and / or function of a tucked long-sleeve shirt during wear.

[0269] It is noted that the examples shown and described are provided for purposes of illustration and are not intended to be limiting. Still other examples are also contemplated.

Examples

example b

[0208] In embodiments implementing this example latching configuration, releasable coupling occurs while the insert portion 14 remains seated within the insert-receiving channel 12 (FIGS. 16A-I). In such embodiments, the insert portion 14 includes one or more entry points 16 aligned at the engagement region 8 with one or more latching elements 9 associated with the base undergarment. As the outer flap 7 is moved toward the closed configuration, one or more corresponding latching elements 10 associated with the outer flap 7 engage the one or more latching elements 9 through the one or more entry points 16, thereby releasably coupling the interchangeable member to the base undergarment.

[0209]The one or more latching elements 9 may be positioned at any suitable locations along the relevant interface region, including front-center, back-center, side locations, or other spaced locations. In an example, the one or more latching elements 9 are disposed on the inner flap 6 and the one or mo...

PRIORITY CLAIM

[0001] This application claims the priority filing benefit of U.S. Provisional patent application Ser. No. 18 / 950,285 filed Nov. 18, 2024 for “Layering Undergarment Minimizer” of Emma Shiers, hereby incorporated by reference in its entirety as though fully set forth herein.BACKGROUND

[0002] The trend of wearing two pairs of pants has emerged as a creative and bold fashion statement, gaining traction in various subcultures and street styles. This look typically involves layering a pair of trousers over another, often with the inner pair being more fitted and the outer pair being looser or more statement-making. This style not only offers a unique aesthetic but also serves as a practical way to adapt to fluctuating temperatures, providing warmth and versatility.

[0003] Fashion influencers and celebrities alike have played a significant role in popularizing this trend, showcasing it on social media platforms and at high-profile events. The dual-pant or layered undergarment look allows for a mix of textures, colors, and patterns, encouraging experimentation and individual expression. Designers are increasingly incorporating this layered approach into their collections, further legitimizing it within the fashion industry and encouraging consumers to embrace unconventional silhouettes.

[0004] Moreover, the trend aligns with the broader movement toward sustainability in fashion, as it encourages consumers to repurpose existing garments instead of purchasing new ones. By layering, individuals can create fresh looks from items already in their wardrobe, promoting creativity while reducing waste. This practical aspect has resonated with environmentally conscious shoppers looking to make thoughtful fashion choices.

[0005] The trend, however, is not without downsides. For example, wearing more than one pair of pants can be bulky and uncomfortable, and in warmer temperatures or indoors, can feel too hot.BRIEF DESCRIPTION OF THE DRAWINGS

[0006] FIGS. 1A-D are flat and worn views of the hero embodiments of the lower base undergarment 2 and the interchangeable waistband member 1 in an assembled condition.

[0007] FIGS. 2-7 are front, back, and side flat views of the hero embodiment of the lower base undergarment 2 configured as a boyshort, shown in both closed and open configurations.

[0008] FIGS. 8-11 are flat and transparent angle views of the hero embodiment of the interchangeable waistband member 1 configured as a sweatpant waistband.

[0009] FIGS. 12A-B are transparent angle views showing the hero embodiment of the interchangeable waistband member 1 aligned for attachment to the lower base undergarment 2.

[0010] FIGS. 13A-J are cross-sectional views illustrating representative latching configuration implementations.

[0011] FIGS. 14A-I illustrate a representative attachment sequence of the lower base undergarment 2 and interchangeable waistband member 1 hero embodiments.

[0012] FIGS. 15A-C are cross-sectional views illustrating representative latching configuration implementations.

[0013] FIGS. 16A-I illustrate a representative attachment sequence of the lower base undergarment 2 and interchangeable waistband member 1 hero embodiments.

[0014] FIGS. 17A-21B are flat views of another lower base undergarment 2 configured as a thong (FIGS. 17A-B), a cheeky (FIGS. 18A-B), a brief (FIGS. 19A-B), a trunk (FIGS. 20A-B), and a boxer brief (FIGS. 21A-B).

[0015] FIGS. 22A-26B are flat views of another interchangeable waistband member 1 configured as a jean waistband (FIGS. 22A-B), a trouser waistband (FIGS. 23A-B), a basketball short waistband (FIGS. 24A-B), a traditional woven boxer waistband (FIGS. 25A-B), and a bloomer waistband (FIGS. 26A-B).

[0016] FIGS. 27A-D are flat and worn views of the hero embodiment of the interchangeable fold over member 22 configured as a mini skirt fold over.

[0017] FIGS. 28A-29D are flat and worn views of another interchangeable fold over member 22 configured as a midi skirt (FIGS. 28A-D) and a maxi skirt (FIGS. 29A-D).

[0018] FIGS. 30A-L illustrate a representative attachment sequence of the lower base undergarment 2 and interchangeable fold over member 22 hero embodiments.

[0019] FIGS. 31A-34C are flat views of the upper base undergarment 19 hero embodiment configured as a bralette, shown in closed and open configurations demonstrating example latching configurations.

[0020] FIGS. 35A-37B are flat views of another upper base undergarment 19 configured as an underwire bra (FIGS. 35A-B), a sports bra (FIGS. 36A-B), and a bandeau (FIGS. 37A-B).

[0021] FIGS. 38A-B are flat and worn views of the hero embodiment of the interchangeable underlay member 24 configured as a medium-length button-down underlay.

[0022] FIGS. 39A-40B are flat and worn views of another interchangeable underlay member 24 configured as a short-length tank-top-style underlay (FIGS. 39A-B) and a long-length lace-style underlay (FIGS. 40A-B).

[0023] FIGS. 41A-J illustrate a representative attachment sequence of the upper base undergarment 19 and interchangeable underlay member 24 hero embodiments.

[0024] FIGS. 42A-43 are flat views and a worn view of the hero embodiment of the interchangeable tuck away member 26 configured as a button-down-style tuck away.

[0025] FIGS. 44A-46B are flat views of another interchangeable tuck away member 26 configured as a tank top (FIGS. 44A-B), a t-shirt (FIGS. 45A-B), and a long-sleeve shirt (FIGS. 46A-B).

[0026] FIGS. 47A-K illustrate a representative attachment sequence of another trunk-style lower base undergarment 2 and the button-down-style interchangeable tuck away member 26 hero embodiment.

[0027] FIGS. 48A-B are front and back views of a permanently affixed embodiment of an interchangeable waistband member 1 (jean-style variant) and a lower base undergarment 2 (trunk-style variant).DETAILED DESCRIPTION

[0028] The rising trend of wearing boxers or other undergarments under loose-fitting pants presents several challenges. As this trend has evolved, many wearers have found it challenging to wear certain undergarments under pants with a slimmer silhouette. Layering causes discomfort and distorts the figure. Women are particularly inclined toward this trend and often wear men's boxers under their pants to achieve the layered look. However, since most boxers are designed for the male body, they tend to be uncomfortable and unflattering for women. This challenge also applies to bloomers, as people aim for a layered look with them but struggle to find bloomers that lay properly under pants. Even when bloomers do layer correctly, they often aren't compatible with more form-fitting bottoms that have a slimmer silhouette around the hips.

[0029] The invention disclosed herein relates to modular layering garment systems including a modular attachment system configured to couple a Base undergarment and an interchangeable member at a defined interface. The modular attachment system is the core focus of the present disclosure and is described across lower-body and upper-body implementations, multiple garment categories, and multiple coupling arrangements.

[0030] An example layering garment is disclosed that provides the visual appearance of wearing multiple pairs of pants by simulating undergarments or secondary trousers layered beneath outerwear, without the physical bulk or discomfort typically associated with wearing multiple separate garments. Having the appearance of layering more than one pair of pants reflects a shift toward bold self-expression, versatility, and sustainability in fashion. As this trend continues to evolve, the layering garment invites wearers to explore their personal style while making a statement about their creativity. Whether on the streets or in high fashion, this layered look is likely to remain a captivating element of contemporary style.

[0031] An example modular layering garment system is provided including a base undergarment and an interchangeable member that are separable components configured for releasable coupling. The base undergarment includes an interface region and a modular attachment system positioned at the interface region. The modular attachment system features channel-forming flaps 5, which include an inner flap 6 positioned on a body-facing side and secured along at least one attachment line, and an outer flap 7 positioned opposite the inner flap 6 and secured along a hinge zone 11. Together, the inner flap 6 and the outer flap 7 define an insert-receiving channel 12. The outer flap 7 is movable about the hinge zone 11 between an open configuration exposing an opening region of the insert-receiving channel 12, and a closed configuration wherein the outer flap 7 overlies the inner flap 6 to cover and at least partially enclose the insert-receiving channel 12. The modular attachment system further includes at least one latching element 9 disposed at an engagement region 8.

[0032] In an example, the interchangeable member includes a visible body portion extending from an insert portion 14 configured to be removably received within the insert-receiving channel 12 through the opening region when the outer flap 7 is in the open configuration. The insert portion 14 includes opposing first 17 and second flat sides 18 configured to contact opposing surfaces of the inner flap 6 and the outer flap 7 when seated within the insert-receiving channel 12. The insert portion 14 further includes at least one engagement feature configured to cooperate with the latching element 9 to releasably couple the interchangeable member to the base undergarment. In an assembled condition, the insert portion 14 is seated within the insert-receiving channel 12, the outer flap 7 is repositioned to the closed configuration restricting access to the opening region, and the interchangeable member is releasably retained relative to the base undergarment by structural capture of the insert portion 14 between the channel-forming flaps 5 alongside latching engagement at the engagement region 8. The engagement feature of the insert portion 14 includes either: (i) corresponding latching elements 10 configured for direct mating engagement with the base undergarment latching elements 9, or (ii) entry points 16 extending through the insert portion 14 configured to align with latching elements 9 to permit releasable engagement while the insert portion 14 remains seated.

[0033] In an example, the base undergarment may be configured for different regions of the body. In an example, the base undergarment is a lower base undergarment 2 configured for wear on a lower torso region, wherein the interface region includes a waist region 3. The lower base undergarment 2 may be configured as a silhouette selected from a boyshort, a thong, a cheeky, a brief, a trunk, and a boxer brief. In other embodiments, the base undergarment is an upper base undergarment 19 configured for wear on an upper torso region, wherein the interface region includes a band region 20. The upper base undergarment 19 may be configured as a silhouette selected from a bralette, an underwire bra, a sports bra, and a bandeau.

[0034] In an example, the interchangeable member may likewise be configured in various silhouettes and styles. The interchangeable member may be an interchangeable waistband member 1 having the insert portion 14 positioned along a lower region and a visible waistband body portion 13 extending circumferentially and positioned externally relative to the base undergarment. Waistband silhouettes may include a sweatpant waistband, a jean waistband, a trouser waistband, a basketball short waistband, a traditional woven boxer waistband, and a bloomer waistband. Alternatively, the interchangeable member may be an interchangeable fold over member 22 having the insert portion 14 positioned along an upper region and a visible fold over body portion 23 configured to overlie at least an upper portion of a lower body garment. Fold over silhouettes include a mini skirt fold over, a midi skirt fold over, and a maxi skirt fold over.

[0035] Further interchangeable member variations include underlay and tuck away options. The interchangeable member may be an interchangeable underlay member 24 with an insert portion 14 positioned along an upper region and a visible underlay body portion 25 configured to extend downward beneath an upper body garment. Underlay silhouettes include a medium-length button-down underlay, a short-length tank-top-style underlay, and a long-length lace-style underlay. The interchangeable member may also be an interchangeable tuck away member 26 with an insert portion 14 positioned along a lower region and a visible tuck away body portion 27 extending upward along at least a portion of a torso such that at least a lower portion of the tuck away body portion 27 is retained in a tucked configuration relative to the base undergarment. Tuck away silhouettes include a button-down shirt, a tank top, a t-shirt, and a long-sleeve shirt.

[0036] In an example, the system incorporates releasable coupling configurations. In embodiments utilizing direct mating engagement, the at least one latching element 9 and the at least one corresponding latching element 10 include releasable coupling structures selected from buttons, snaps, hook-and-loop structures, hook-and-eye structures, clasps, interlocking fasteners, g-hooks, push snap buckles, and magnets. In embodiments utilizing engagement through the insert portion 14, the outer flap 7 further includes corresponding latching elements 10 configured to engage the latching elements 9 of the base undergarment through entry points 16 when the outer flap 7 is moved toward the closed configuration. These entry points 16 may include openings, slits, cut-outs, apertures, notches, reinforced holes, and buttonhole-type openings. Furthermore, latching elements 9 may be positioned at spaced circumferential locations including a front-center region, a back-center region, and one or more side regions around the interface region.

[0037] In an example, the system may include additional retention features. The modular attachment system may further include a high-friction region 15 disposed on at least one of the opposing first 17 and second flat sides 18 of the insert portion 14, a channel-facing side of the inner flap 6, and a channel-facing side of the outer flap 7 to increase frictional engagement and resist relative sliding or withdrawal of the insert portion 14. The high-friction region 15 may include printed elastomer features, silicone features, a textured coating, a friction-enhancing film, a grippy tape, or a high-friction textile structure.

[0038] The modular attachment system may be configured to support releasable coupling between the base undergarment and the interchangeable member through cooperation between interface components including channel-forming flaps 5, an insert-receiving channel 12, an insert portion 14, and, in an example, one or more latching-related components positioned at an engagement region 8. In this manner, the disclosed systems may permit repeated attachment and detachment of compatible garment components while maintaining positional retention, alignment, and a selected aesthetic or functional effect during wear.

[0039] The subject matter described herein includes embodiments directed to lower-body and upper-body garment systems, representative latching configuration families, attachment and detachment sequences. In an example, the disclosed interface arrangements may additionally support permanent attachment implementations. Further embodiments, configurations.

[0040] Before continuing, it is noted that as used herein, the terms “includes” and “including” mean, but is not limited to, “includes” or “including” and “includes at least” or “including at least.” The term “based on” means “based on” and “based at least in part on.”

[0041] Here is a detailed description of the invention based on the provided text, grouped and ordered by the figure numbers.

[0042] FIGS. 1A-D are flat and worn views of the hero embodiments of the lower base undergarment 2 and the interchangeable waistband member 1 in an assembled condition. The modular layering garment system includes a modular attachment system configured to releasably connect a base undergarment and an interchangeable member at a defined interface, permitting repeated attachment and detachment over multiple cycles. In the assembled condition, an insert portion 14 of the interchangeable member is received within an insert-receiving channel 12 defined by channel-forming flaps 5 of the base undergarment so as to position the interchangeable member relative to the base undergarment at the interface and maintain alignment during wear. Retention is provided by structural capture of the insert portion 14 within the insert-receiving channel 12, frictional engagement between interfacing components, releasable latching engagement at an engagement region 8, or combinations thereof, while still permitting intentional manual release. These figures depict assembled front, back, and side views of the interchangeable waistband member 1 configured as a sweatpant waistband coupled to a lower base undergarment 2 configured as a boyshort in a closed configuration using a latching configuration, as well as a worn view where a lower body garment (pants) is worn over the lower base undergarment 2.

[0043] FIGS. 2-7 are flat views of the hero embodiment of the lower base undergarment 2 configured as a boyshort, shown in both closed and open configurations. The lower base undergarment 2 is worn on a lower torso region, covers at least the groin and buttock regions, and includes a waist region 3 and a lower body region 4 with leg openings. It may include a front portion, a back portion, a crotch region (optionally with a gusset), and may be formed from textile materials like stretch knit fabrics. The modular attachment system is positioned at an upper portion of the lower base undergarment 2 and extends around at least a portion of the waist opening. The system includes channel-forming flaps 5 including an inner flap 6 and an outer flap 7 that define an insert-receiving channel 12 configured to removably receive an insert portion 14. The inner flap 6 is positioned on a body-facing side, secured along at least one attachment line, and may include elastic reinforcement to lie flat against the wearer, reducing rolling or folding. The outer flap 7 is positioned opposite the inner flap 6 and is secured along an attachment line defining a hinge zone 11, permitting movement of the outer flap 7 between the open and closed configurations. The insert-receiving channel 12 has a height and a depth sized to receive the insert portion 14, where structural retention is provided by contact between the inner 6 and outer flaps 7 against opposing surfaces of the insert portion 14, aided by circumferential stretch of the waist region during wear. In the closed configuration (FIGS. 2-4), the outer flap 7 overlies the inner flap 6 to cover and at least partially enclose the insert-receiving channel 12, restricting access to the opening region and assisting in retaining the insert portion 14 during wear. In the open configuration (FIGS. 5-7), the outer flap 7 is repositioned relative to the inner flap 6 (e.g., folded or pivoted about the hinge zone 11) to expose an opening region of the insert-receiving channel 12, permitting insertion and withdrawal of the insert portion 14. The lower base undergarment 2 further includes one or more latching elements 9 associated with the modular attachment system, which participate in releasable coupling at an engagement region 8 and may be positioned at various circumferential locations (front-center, back-center, sides). These latching elements 9 may be secured to the inner flap 6, outer flap 7, or adjacent to the hinge zone 11.

[0044] FIGS. 8-11 are flat and transparent angle views of the hero embodiment of the interchangeable waistband member 1 configured as a sweatpant waistband. The interchangeable waistband member 1 extends circumferentially as a continuous loop around the wearer during use and aligns with the waist region 3 of the lower base undergarment 2. It includes a waistband body portion 13 and a lower region defining an insert portion 14 configured to be removably received within the insert-receiving channel 12. The waistband body portion 13 includes a visible body portion positioned externally relative to the lower base undergarment 2 and may include elasticized regions, drawstrings, pockets, or other aesthetic details. The insert portion 14 extends circumferentially and includes opposing first 17 and second flat sides 18 defined by material layers. When received in the insert-receiving channel 12, the first flat side 17 faces outward away from the wearer and the second flat side 18 faces inward, contacting opposing surfaces of the inner 6 and outer flaps 7. The insert portion 14 may include a high-friction region 15 on one or both flat sides to increase frictional engagement with the channel-forming flaps 5, resisting relative sliding, shifting, or withdrawal during wear. The high-friction region 15 can be printed elastomer, silicone, a textured coating, or grippy tape. In this configuration, the insert portion 14 includes one or more corresponding latching elements 10 positioned on one or both flat sides to directly engage the latching elements 9 of the lower base undergarment 2. The corresponding latching elements 10 may be located at multiple circumferential locations and are implemented as releasable coupling structures like hook-and-loop, snaps, clasps, buttons, or magnets.

[0045] FIGS. 12A-B are transparent angle views showing the hero embodiment of the interchangeable waistband member 1 aligned for attachment to the lower base undergarment 2. The lower base undergarment 2 is shown in an open configuration to expose the opening region of the insert-receiving channel 12. The interchangeable waistband member 1 is shown spaced above with its insert portion 14 positioned circumferentially to correspond with the insert-receiving channel 12. Direction arrows indicate a downward insertion direction in which the insert portion 14 is advanced into the insert-receiving channel 12 along a waistband path toward the engagement region 8. The engagement region 8 refers to a designated region of the modular attachment system where engagement, alignment, and retention between components occur, serving as a consistent interface reference. When further aligned, the components register at the engagement region 8 along the waist interface prior to the engagement of latching components and the repositioning of the outer flap 7 to the closed configuration.

[0046] FIGS. 13A-J are cross-sectional views illustrating representative latching configuration implementations. In these latching configurations, releasable coupling is achieved through direct mating engagement between latching elements 9 associated with the base undergarment and corresponding latching elements 10 associated with the insert portion 14. The figures show the insert portion 14 seated within the insert-receiving channel 12 and structurally captured by the channel-forming flaps 5, with the outer flap 7 partially displaced to depict the open configuration. The implementations shown include a smaller / narrower hook-and-loop arrangement on the inner flap 6 and insert portion 14 (FIG. 13A), a larger / wider hook-and-loop arrangement (FIG. 13B), a button-style coupling (FIG. 13C), snap fasteners optionally combined with magnets (FIG. 13D), hook-and-loop tape (FIG. 13E), interlocking fasteners (FIG. 13F), g-hooks (FIG. 13G), garter hook components (FIG. 13H), interlocking twin clasps (FIG. 13I), and push snap buckles (FIG. 13J).

[0047] FIGS. 14A-I illustrate a representative attachment sequence of the lower base undergarment 2 and interchangeable waistband member 1 hero embodiments implemented in a latching configuration. Attachment begins with the components separate and the lower base undergarment 2 in the closed configuration (FIG. 14A). The outer flap 7 is moved downward about the hinge zone 11 relative to the inner flap 6 to the open configuration to expose the opening region of the insert-receiving channel 12 (FIG. 14B). The insert portion 14 is then aligned, inserted, and seated into the insert-receiving channel 12, entering the engagement region 8 (FIG. 14C). Direct mating engagement then occurs between each latching element 9 on the inner flap 6 and each corresponding latching element 10 on the insert portion 14 at a plurality of circumferential locations (FIGS. 14D-E). Once seated and engaged, the outer flap 7 is repositioned about the hinge zone 11 toward the closed configuration (FIG. 14F). The fully attached condition features the insert portion 14 seated within the insert-receiving channel 12, the latching components engaged, and the outer flap 7 overlying the opening region to cover and at least partially enclose the interface (FIGS. 14G-I). Detachment is carried out by reversing this sequence, moving the outer flap 7 to the open configuration, disengaging the latching components, and withdrawing the insert portion 14.

[0048] FIGS. 15A-C are cross-sectional views illustrating representative latching configuration implementations. In these configurations, releasable coupling occurs while the insert portion 14 remains seated within the insert-receiving channel 12. The insert portion 14 includes one or more entry points 16—such as openings, slits, cut-outs, or buttonholes—aligned at the engagement region 8 with latching elements 9 associated with the base undergarment. As the outer flap 7 moves toward the closed configuration, corresponding latching elements 10 associated with the outer flap 7 engage the latching elements 9 through the entry points 16. Implementations shown include a button-style coupling (FIG. 15A), snap fasteners optionally combined with magnets (FIG. 15B), and a keyhole-style coupling (FIG. 15C).

[0049] FIGS. 16A-I illustrate a representative attachment sequence of the lower base undergarment 2 and interchangeable waistband member 1 hero embodiments implemented in a latching configuration. Attachment begins with the lower base undergarment 2 in the closed configuration (FIG. 16A). The outer flap 7 is moved about the hinge zone 11 to expose the opening region (FIG. 16B). The insert portion 14 is aligned and seated into the insert-receiving channel 12 such that each latching element 9 on the inner flap 6 registers with each entry point 16 on the insert portion 14 while the outer flap 7 remains open (FIGS. 16C-D). The outer flap 7 is then repositioned partially into the closed configuration so that the corresponding latching elements 10 on the outer flap 7 engage the latching elements 9 through the entry points 16 at the engagement region 8 (FIG. 16E). The outer flap 7 continues toward the closed configuration (FIG. 16F). In the attached condition, the insert portion 14 remains seated, and the outer flap 7 overlies the opening region to enclose the interface (FIGS. 16G-I).

[0050] FIGS. 17A-21B are flat views of another lower base undergarment 2, each including an inner flap 6, an outer flap 7, an insert-receiving channel 12, and configured to maintain compatibility with an interchangeable member through the modular attachment system. FIGS. 17A-B depict a thong variant providing reduced rear coverage with a narrow rear portion. FIGS. 18A-B depict a cheeky variant with higher-cut leg openings and a reduced seat coverage profile. FIGS. 19A-B depict a brief variant with a higher leg opening and front coverage profile suitable for a male wearer. FIGS. 20A-B depict a trunk variant providing increased leg length and a generally straight leg opening extending partially down the upper thigh. FIGS. 21A-B depict a boxer brief variant providing further increased leg length and extended lower-body coverage down the thigh.

[0051] FIGS. 22A-26B are flat views of interchangeable waistband members 1, each defining an insert portion 14 along a lower region and featuring a waistband body portion 13 shaped to present a distinct style geometry. FIGS. 22A-B depict a jean waistband configured with a zipper, button, pocket, or belt-loop structure. FIGS. 23A-B depict a trouser waistband that may include pocket structures or pleat-simulating details. FIGS. 24A-B depict a basketball short waistband. FIGS. 25A-B depict a traditional woven boxer waistband. FIGS. 26A-B depict a bloomer waistband.

[0052] FIGS. 27A-D are flat and worn views of the hero embodiment of the interchangeable fold over member 22 configured as a mini skirt fold over. The interchangeable fold over member 22 extends circumferentially as a continuous loop and aligns with the waist region 3 of the lower base undergarment 2. It includes a fold over body portion 23 and an upper region defining an insert portion 14 to be removably received within the insert-receiving channel 12. The fold over body portion 23 includes a visible portion configured to overlie at least a portion of the wearer's lower body, positioned externally relative to a lower body garment to provide a fold over layered effect. In the mini skirt variant, the fold over body portion 23 extends downward to end at or near a thigh region. The insert portion 14 includes opposing flat sides, and optionally includes a high-friction region 15, entry points 16, or corresponding latching elements 10.

[0053] FIGS. 28A-29D are flat and worn views of interchangeable fold over members 22. FIGS. 28A-D depict a midi skirt variant where the fold over body portion 23 extends downward to end at or near a knee region. FIGS. 29A-D depict a maxi skirt variant where the fold over body portion 23 extends downward to end at or near an ankle region.

[0054] FIGS. 30A-L illustrate a representative attachment sequence of the lower base undergarment 2 and interchangeable fold over member 22 hero embodiments implemented in a latching configuration. The sequence begins with the wearer wearing the lower base undergarment 2 in the closed configuration (FIG. 30A). The outer flap 7 is moved to the open configuration to expose the channel (FIG. 30B). The interchangeable fold over member 22 is positioned while the wearer holds the fold over body portion 23 upward to access the waist interface (FIG. 30C). The insert portion 14 is seated such that the entry points 16 register with the latching elements 9 (FIGS. 30D-E). The outer flap 7 is repositioned so the latching arrangement engages at the engagement region 8 (FIG. 30F), establishing the attached waist-interface condition (FIGS. 30G-H). A lower body garment (e.g., pants) is then worn over the lower base undergarment 2 (FIG. 301), and the fold over body portion 23 is folded downward over an upper portion of the lower body garment (FIG. 30J). In the fully assembled condition, the fold over body portion 23 is positioned externally of the lower body garment (FIGS. 30K-L).

[0055] FIGS. 31A-34C are flat views of the upper base undergarment 19 hero embodiment configured as a bralette. The upper base undergarment 19 is worn on an upper torso region, covering at least a chest region, and includes a band region 20 and an upper body region 21 (chest-covering region) with left and right chest-covering portions and shoulder straps. The modular attachment system is positioned at a lower portion of the upper base undergarment 19 and extends along at least a portion of the band region 20. The channel-forming flaps 5 define an insert-receiving channel 12, behaving similarly to the lower base undergarment 2, providing open and closed configurations via a hinge zone 11. Circumferential stretch of the band region 20 during wear increases contact pressure for retention. The figures demonstrate both a latching configuration as shown in FIGS. 31A-C closed, FIGS. 32A-C open, and a latching configuration as shown in FIGS. 33A-C closed, FIGS. 34A-C open.

[0056] FIGS. 35A-37B are flat views of upper base undergarments 19, each including an inner flap 6, an outer flap 7, and an insert-receiving channel 12 at the band region 20. FIGS. 35A-B depict an underwire bra variant offering a more structured configuration with shaped cups and underwire support elements. FIGS. 36A-B depict a sports bra variant extending across a greater area of the upper torso with wider straps and increased support. FIGS. 37A-B depict a bandeau variant extending across the front without strap portions.

[0057] FIGS. 38A-B are flat and worn views of the hero embodiment of the interchangeable underlay member 24 configured as a medium-length button-down underlay. The interchangeable underlay member 24 extends circumferentially around the wearer and aligns with the band region 20 of the upper base undergarment 19. It includes an underlay body portion 25 and an upper region defining an insert portion 14. The underlay body portion 25 is configured to extend downward beneath an upper body garment to provide a layered visual effect, additional coverage, and a visible underlayer effect. In this medium-length variant, the underlay body portion 25 hangs downward from the torso region. The worn view illustrates a sweater vest worn over the upper base undergarment 19 and an upper region of the underlay body portion 25.

[0058] FIGS. 39A-40B are flat and worn views of interchangeable underlay members 24. FIGS. 39A-B depict a short-length tank-top-style underlay extending downward to end at or near a waist region. FIGS. 40A-B depict a long-length lace-style underlay extending downward to end at or near a lower leg region of the wearer.

[0059] FIGS. 41A-J illustrate a representative attachment sequence of the upper base undergarment 19 and interchangeable underlay member 24 hero embodiments implemented in a latching configuration. Attachment begins with the upper base undergarment 19 in the closed configuration (FIG. 41A). The outer flap 7 is moved to expose the opening region of the insert-receiving channel 12 (FIG. 41B). The insert portion 14 is inserted and seated at the engagement region 8 (FIG. 41C). Direct mating engagement of latching components occurs (FIGS. 41D-E). The outer flap 7 is repositioned to the closed configuration (FIG. 41F). In the attached condition, the interface is enclosed (FIGS. 41G-H). An upper body garment is then worn over the upper base undergarment 19, allowing the underlay member to extend downward beneath it (FIGS. 41I-J).

[0060] FIGS. 42A-43 are flat views and a worn view of the hero embodiment of the interchangeable tuck away member 26 configured as a button-down-style tuck away. The interchangeable tuck away member 26 includes a tuck away body portion 27 (upper body garment portion) and a lower region defining an insert portion 14 configured for releasable coupling to a lower base undergarment 2. In use, the lower base undergarment 2 is worn beneath a lower body garment, and the tuck away body portion 27 extends upward from the waist region along the wearer's torso. At least a lower portion of the tuck away body portion 27 is retained in a tucked configuration relative to the lower base undergarment 2 to maintain the appearance and / or function of a tucked upper body garment.

[0061] FIGS. 44A-46B are flat views of interchangeable tuck away members 26, all of which feature tuck away body portions 27 extending upward from the waist region. FIGS. 44A-B depict a tank-top-style tuck away member. FIGS. 45A-B depict a t-shirt-style tuck away member. FIGS. 46A-B depict a long-sleeve-shirt-style tuck away member.

[0062] FIGS. 47A-K illustrate a representative attachment sequence of another trunk-style lower base undergarment 2 and the button-down-style interchangeable tuck away member 26 hero embodiment, implemented in a latching configuration. The sequence starts with the closed lower base undergarment 2 (FIG. 47A), moves to the open configuration (FIG. 47B), followed by inserting and seating the insert portion 14 (FIG. 47C). The latching components engage at the engagement region 8 (FIGS. 47D-F). The outer flap 7 is returned to the closed configuration (FIG. 47G). The fully attached condition is established (FIGS. 47H-I). A lower body garment is then worn over the lower base undergarment 2 while the tuck away body portion 27 remains visible to provide the tucked appearance (FIGS. 47J-K).

[0063] FIGS. 48A-B are front and back views of a permanently affixed embodiment of an interchangeable waistband member 1 (jean-style variant) and a lower base undergarment 2 (trunk-style variant). While the modular attachment system primarily enables releasable coupling, in an example, the interface arrangements support permanent attachment implementations. Here, the interchangeable waistband member 1 is fixed relative to the lower base undergarment 2 along an upper region (e.g., permanently affixed at or adjacent to the engagement region 8 by stitching, bonding, or welding) rather than removably coupled thereto.Base Undergarment Hero Embodiments

[0064] Lower Base Undergarment Hero Embodiment—Boyshort. The modular attachment system includes a base undergarment and an interchangeable member that are separable components. The base undergarment may be implemented as either a lower base undergarment 2 or an upper base undergarment 19, depending on the intended area of wear. The lower base undergarment 2 is configured for wear on a lower torso region of a wearer and covers at least the groin and buttock regions. In the hero embodiment, the lower base undergarment 2 is implemented as a boyshort silhouette, as shown in FIGS. 2-4. The lower base undergarment 2 includes a waist region 3 and a lower body region 4 with leg openings defining a boyshort-style profile.

[0065] The lower base undergarment 2 may be formed from any suitable textile material, including knit or stretch knit fabrics. Representative examples include cotton / spandex blends, nylon / spandex blends, and other elastic textiles. Seams and finishes may include stitching, bonding, taping, or combinations thereof.

[0066] In this hero embodiment, the lower base undergarment 2 includes a front portion, a back portion, and a crotch region, as shown in FIGS. 2-4. In an example, a gusset may be provided in the crotch region and may include one or more layers, including a lining layer. The various portions of the lower base undergarment 2 may be joined by seams or other suitable construction techniques. These construction features are representative only, and other garment constructions may be used.

[0067] The waist region 3 includes a portion of the modular attachment system, as shown in FIGS. 2-7. In this embodiment, the modular attachment system includes channel-forming flaps 5 including an inner flap 6 and an outer flap 7 positioned at an upper portion of the lower base undergarment 2 and extending around at least a portion of the waist opening. The channel-forming flaps 5 define an insert-receiving channel 12 configured to removably receive an insert portion 14 of an interchangeable member.

[0068] As shown in FIGS. 2-4, the lower base undergarment 2 may be in a closed configuration in which the outer flap 7 overlies the inner flap 6 to cover and at least partially enclose the insert-receiving channel 12 and retain the insert portion 14 therein. As shown in FIGS. 5-7, the lower base undergarment 2 may be in an open configuration in which the outer flap 7 is repositioned relative to the inner flap 6 to expose an opening region of the insert-receiving channel 12, thereby permitting insertion and withdrawal of the insert portion 14 relative to the insert-receiving channel 12.

[0069] Channel-Forming Flaps. The modular attachment system includes channel-forming flaps 5 including an inner flap 6 and an outer flap 7 positioned at an upper portion of the lower base undergarment 2 and extending around at least a portion of the waist opening, as shown in FIGS. 2-7. Together, the inner flap 6 and the outer flap 7 define the insert-receiving channel 12 and cooperate to receive and retain the insert portion 14 of a compatible interchangeable member.

[0070] In the closed configuration (FIGS. 2-4), the outer flap 7 overlies the inner flap 6 along at least a portion of the waist region 3 to cover and at least partially enclose the insert-receiving channel 12. In the open configuration (FIGS. 5-7), the outer flap 7 is repositioned relative to the inner flap 6 to expose an opening region of the insert-receiving channel 12. In an example, the channel-forming flaps 5 align at an engagement region 8 where releasable coupling occurs between interface components.

[0071] Inner Flap. The inner flap 6 is positioned on a body-facing side of the lower base undergarment 2 such that, in use, the inner flap 6 contacts the wearer's body. The inner flap 6 is secured along at least one attachment line at the waist region 3 and defines one side of the insert-receiving channel 12. In an example, the inner flap 6 may include elastic reinforcement and / or a high-friction region 15.

[0072] Outer Flap. The outer flap 7 is positioned opposite the inner flap 6 and is movable between the open configuration and the closed configuration. The outer flap 7 is secured along an attachment line defining a hinge zone 11 and defines an opposite side of the insert-receiving channel 12. In an example, the outer flap 7 may include a high-friction region 15.

[0073] Insert-Receiving Channel. The insert-receiving channel 12 is defined as the space between the inner flap 6 and the outer flap 7, as shown in FIGS. 5-7. The insert-receiving channel 12 is configured to removably receive an insert portion 14 of an interchangeable member through the opening region exposed in the open configuration. In the open configuration, the outer flap 7 is repositioned away from the inner flap 6 about the hinge zone 11 to expose the opening region of the insert-receiving channel 12 and permit insertion or withdrawal of the insert portion 14. In the closed configuration, the outer flap 7 overlies the opening region such that the insert-receiving channel 12 is covered and at least partially enclosed.

[0074] The insert-receiving channel 12 has a height and a depth configured to receive the insert portion 14. In an example, retention may be provided structurally by contact between the inner flap 6 and the outer flap 7 against opposing surfaces of the insert portion 14 when the insert portion 14 is received within the insert-receiving channel 12. In an example, circumferential stretch of the waist region 3 during wear increases contact pressure between the channel-forming flaps 5 and the insert portion 14 within the insert-receiving channel 12.

[0075] iii. Latching Elements. The lower base undergarment 2 may include one or more latching elements 9 associated with the modular attachment system (FIGS. 5-7). The one or more latching elements 9 are configured to participate in releasable coupling between the lower base undergarment 2 and an interchangeable member when the insert portion 14 is received within the insert-receiving channel 12. Releasable coupling may occur at the engagement region 8 and may be implemented according to different latching families, including an Example A latching configuration and an Example B latching configuration using one or more corresponding latching elements 10 disposed on a mating interface component.

[0076] The one or more latching elements 9 may be positioned at circumferential locations including a front-center region, a back-center region, one or more side regions, and / or multiple locations around the waist opening. The one or more latching elements 9 may be provided as spaced locations or as a generally continuous latching strip.

[0077] The latching elements 9 may be secured to the inner flap 6, the outer flap 7, and / or a region adjacent to the hinge zone 11 by any suitable technique, including stitching, bar-tacking, bonding, welding, capture within a seam, or combinations thereof.Upper Base Undergarment Hero Embodiment—Bralette.

[0078] The base undergarment may be implemented as either a lower base undergarment 2 or an upper base undergarment 19, depending on the intended area of wear. The upper base undergarment 19 is configured for wear on an upper torso region of a wearer and supports and covers at least a chest region of the wearer. In the hero embodiment, the upper base undergarment 19 is implemented as a bralette silhouette, as shown in FIGS. 31A-C and FIGS. 33A-C. The upper base undergarment 19 includes a band region 20 and a chest-covering region, with the band region 20 extending around at least a portion of the upper torso of the wearer.

[0079] The upper base undergarment 19 may be formed from any suitable textile material, including knit or stretch knit fabrics. Representative examples include cotton / spandex blends, nylon / spandex blends, and other elastic textiles. Seams and finishes may include stitching, bonding, taping, or combinations thereof.

[0080] In this hero embodiment, the upper base undergarment 19 includes left and right chest-covering portions positioned at a forward body portion of the garment, as shown in FIG. 31A. The upper base undergarment 19 may further include strap portions configured to pass over corresponding shoulder regions of the wearer, as shown in FIGS. 31A-C. In an example, the chest-covering portions may be formed from one or more fabric panels and may optionally include lining layers, support layers, or double-layer constructions. Side regions of the upper base undergarment 19 extend between the chest-covering region and a rear body portion, as shown in FIGS. 31B-C. These construction features are representative only, and other upper-body garment constructions may be used.

[0081] The band region 20 includes a portion of the modular attachment system, as shown in FIGS. 31A-34C. In this embodiment, the modular attachment system includes channel-forming flaps 5 including an inner flap 6 and an outer flap 7 positioned at a lower portion of the upper base undergarment 19 and extending along at least a portion of the band region 20. The channel-forming flaps 5 define an insert-receiving channel 12 configured to removably receive an insert portion 14 of an interchangeable member.

[0082] As shown in FIGS. 31A-C and FIGS. 33A-C, the upper base undergarment 19 may be in a closed configuration in which the outer flap 7 overlies the inner flap 6 to cover and at least partially enclose the insert-receiving channel 12 and retain the insert portion 14 therein. As shown in FIGS. 32A-C and FIGS. 34A-C, the upper base undergarment 19 may be in an open configuration in which the outer flap 7 is repositioned relative to the inner flap 6 to expose an opening region of the insert-receiving channel 12, thereby permitting insertion and withdrawal of the insert portion 14 relative to the insert-receiving channel 12.

[0083] Channel-Forming Flaps. The modular attachment system includes channel-forming flaps 5 including an inner flap 6 and an outer flap 7 positioned at a lower portion of the upper base undergarment 19 and extending along at least a portion of the band region 20, as shown in FIGS. 31A-34C. Together, the inner flap 6 and the outer flap 7 define the insert-receiving channel 12 and cooperate to receive and retain the insert portion 14 of a compatible interchangeable member.

[0084] In the closed configuration (FIGS. 31A-C and FIGS. 33A-C), the outer flap 7 overlies the inner flap 6 along at least a portion of the band region 20 to cover and at least partially enclose the insert-receiving channel 12. In the open configuration (FIGS. 32A-C and FIGS. 34A-C), the outer flap 7 is repositioned relative to the inner flap 6 to expose an opening region of the insert-receiving channel 12. In an example, the channel-forming flaps 5 align at an engagement region 8 where releasable coupling occurs between interface components.

[0085] Inner Flap. The inner flap 6 is positioned on a body-facing side of the upper base undergarment 19 such that, in use, the inner flap 6 contacts the wearer's body. The inner flap 6 is secured along at least one attachment line at the band region 20 and defines one side of the insert-receiving channel 12. In an example, the inner flap 6 may include elastic reinforcement and / or a high-friction region 15.

[0086] Outer Flap. The outer flap 7 is positioned opposite the inner flap 6 and is movable between the open configuration and the closed configuration. The outer flap 7 is secured along an attachment line defining a hinge zone 11 and defines an opposite side of the insert-receiving channel 12. In an example, the outer flap 7 may include a high-friction region 15.

[0087] Insert-Receiving Channel. The insert-receiving channel 12 is defined as the space between the inner flap 6 and the outer flap 7, as shown in FIGS. 32A-C and FIGS. 34A-C. The insert-receiving channel 12 is configured to removably receive an insert portion 14 of an interchangeable member through the opening region exposed in the open configuration. In the open configuration, the outer flap 7 is repositioned away from the inner flap 6 about the hinge zone 11 to expose the opening region of the insert-receiving channel 12 and permit insertion or withdrawal of the insert portion 14. In the closed configuration, the outer flap 7 overlies the opening region such that the insert-receiving channel 12 is covered and at least partially enclosed.

[0088] The insert-receiving channel 12 has a height and a depth configured to receive the insert portion 14. In an example, retention may be provided structurally by contact between the inner flap 6 and the outer flap 7 against opposing surfaces of the insert portion 14 when the insert portion 14 is received within the insert-receiving channel 12. In an example, circumferential stretch of the band region 20 during wear increases contact pressure between the channel-forming flaps 5 and the insert portion 14 within the insert-receiving channel 12.

[0089] Latching Elements. The upper base undergarment 19 may include one or more latching elements 9 associated with the modular attachment system (FIGS. 32A-C). The one or more latching elements 9 are configured to participate in releasable coupling between the upper base undergarment 19 and an interchangeable member when the insert portion 14 is received within the insert-receiving channel 12. Releasable coupling may occur at the engagement region 8 and may be implemented according to different latching families, including an Example A latching configuration and an Example B latching configuration using one or more corresponding latching elements 10 disposed on a mating interface component.

[0090] The one or more latching elements 9 may be positioned at circumferential locations including a front-center region, a back-center region, one or more side regions, and / or multiple locations around the band region 20. The one or more latching elements 9 may be provided as spaced locations or as a generally continuous latching strip.

[0091] The latching elements 9 may be secured to the inner flap 6, the outer flap 7, and / or a region adjacent to the hinge zone 11 by any suitable technique, including stitching, bar-tacking, bonding, welding, capture within a seam, or combinations thereof.Interchangeable Member Hero Embodiments.

[0092] Interchangeable Waistband Member Hero Embodiment—Sweatpant. The modular attachment system further includes an interchangeable member separable from a base undergarment and configured for releasable coupling therewith during wear by a wearer. The interchangeable member may be implemented as an interchangeable waistband member 1, an interchangeable fold over member 22, an interchangeable underlay member 24, or an interchangeable tuck away member 26, each configured to cooperate with a base undergarment to provide a selected aesthetic appearance, functional coverage, garment layering effect, and / or positional retention of an associated garment portion.

[0093] The interchangeable waistband member 1 is configured to be worn on a torso region of a wearer in combination with a lower base undergarment 2. In the hero embodiment, the interchangeable waistband member 1 extends circumferentially as a continuous loop around the wearer during use and is configured to align with the waist region 3 of the lower base undergarment 2. As shown in FIGS. 8-10, the interchangeable waistband member 1 is implemented as a sweatpant-style waistband and includes a waistband body portion 13 and a lower region defining an insert portion 14 configured to be removably received within the insert-receiving channel 12 of the lower base undergarment 2.

[0094] In an example, the insert portion 14 extends circumferentially around the interchangeable waistband member 1 and is dimensioned to be received between the inner flap 6 and the outer flap 7 within the insert-receiving channel 12. In an example, the insert portion 14 includes one or more engagement features, including one or more corresponding latching elements 10, one or more entry points 16, and / or a high-friction region 15.

[0095] The interchangeable waistband member 1 may be formed from any suitable textile material, including woven fabrics, knit fabrics, stretch knit fabrics, and combinations thereof. Representative examples include cotton / spandex blends, nylon / spandex blends, fleece constructions, terry constructions, and other elastic or non-elastic textiles. Seams and finishes may include stitching, bonding, taping, or combinations thereof.

[0096] The interchangeable waistband member 1 includes an upper edge region defining a top perimeter of the member and a lower region transitioning into the insert portion 14. In an example, the upper edge region may be finished by a folded hem, bound edge, bonded edge, enclosed elastic, jacquard waistband structure, or combinations thereof.

[0097] Insert Portion. The insert portion 14 includes a lower portion of the interchangeable waistband member 1 and is configured to be removably received within the insert-receiving channel 12 of a lower base undergarment 2. The insert portion 14 extends circumferentially around the interchangeable waistband member 1 and is dimensioned to be received between the inner flap 6 and the outer flap 7 within the insert-receiving channel 12.

[0098] As shown in FIG. 11, the insert portion 14 includes opposing first 17 and second flat sides 18 defined by material layers in the insert portion 14 region. When the insert portion 14 is received within the insert-receiving channel 12, the first flat side 17 faces outward away from the wearer and the second flat side 18 faces inward toward the wearer such that the flat sides contact opposing surfaces of the inner flap 6 and the outer flap 7.

[0099] In an example, the insert portion 14 may include a high-friction region 15 disposed on one or both flat sides to increase frictional engagement within the insert-receiving channel 12. In embodiments implementing an Example A latching configuration, the insert portion 14 may include one or more corresponding latching elements 10 positioned to engage one or more latching elements 9 associated with the lower base undergarment 2. In embodiments implementing an Example B latching configuration, the insert portion 14 may include one or more entry points 16 configured to align with latching locations at the engagement region 8 and to permit releasable engagement between latching components associated with the lower base undergarment 2 while the insert portion 14 remains seated within the insert-receiving channel 12.

[0100] Waistband Body Portion. The waistband body portion 13 includes a visible body portion of the interchangeable waistband member 1 extending from the insert portion 14 and configured to encircle at least a portion of the wearer's torso during use (FIGS. 8-10). In the hero embodiment, the waistband body portion 13 is implemented as a sweatpant-style waistband portion that extends circumferentially around the wearer and is positioned externally relative to the lower base undergarment 2 when the insert portion 14 is received within the insert-receiving channel 12.

[0101] The waistband body portion 13 may be configured to provide a selected waistband appearance, including a sweatpant waistband, boxer-style waistband, denim waistband, trouser waistband, or other waistband configurations. In an example, the waistband body portion 13 may include one or more elasticized regions, folded edge constructions, drawstring structures, seam lines, decorative details, branding elements, label elements, belt-loop structures, faux fly structures, and / or pocket-simulating elements. The waistband body portion 13 may be formed from one or more fabric layers or panels and may include reinforcement features, lining layers, interfacing materials, and / or elastic members. The sweatpant-style waistband embodiment is provided by way of example only and is not limiting.

[0102] Corresponding Latching Elements. The insert portion 14 of the interchangeable waistband member 1 may include one or more corresponding latching elements 10 associated with the modular attachment system (FIGS. 8-10). Releasable coupling at the engagement region 8 may be implemented according to different latching configuration families, including Example A and Example B, and the presence and placement of corresponding latching elements 10 may vary depending on the selected latching example.

[0103] In embodiments implementing an Example A latching configuration, the corresponding latching elements 10 are disposed on the insert portion 14 and are positioned to engage one or more latching elements 9 associated with the lower base undergarment 2 when the insert portion 14 is received within the insert-receiving channel 12. The corresponding latching elements 10 may be disposed on one flat side of the insert portion 14 or on both flat sides of the insert portion 14. The corresponding latching elements 10 may be arranged as a single latching location, a plurality of spaced latching locations, or a generally continuous latching strip extending along at least a portion of the insert portion 14.

[0104] In the hero embodiment, the corresponding latching elements 10 may be provided at a plurality of circumferential locations, including a front-center location, a back-center location, left and right side locations, and optionally additional locations spaced therebetween. The corresponding latching elements 10 may be implemented using any suitable releasable coupling structures, including hook-and-loop, hook-and-eye, snaps, clasps, buttons, magnets, and hybrid combinations thereof. The corresponding latching elements 10 may be secured to the insert portion 14 by any suitable technique, including stitching, bar-tacking, bonding, welding, capture within a seam, or combinations thereof.

[0105] In an example, the insert portion 14 may omit corresponding latching elements 10 and instead include one or more entry points 16 configured to cooperate with latching components associated with the lower base undergarment 2 when the insert portion 14 is seated within the insert-receiving channel 12.

[0106] Entry Points. In an example, the insert portion 14 of the interchangeable waistband member 1 includes one or more entry points 16 associated with the modular attachment system (FIGS. 15A-C). The entry points 16 may be configured to cooperate with latching components associated with the lower base undergarment 2, for example in embodiments implementing an Example B latching configuration in which releasable engagement occurs while the insert portion 14 remains seated within the insert-receiving channel 12.

[0107] The entry points 16 may be positioned on one or both flat sides of the insert portion 14 or may extend through the thickness of the insert portion 14 at selected latching locations. The entry points 16 may be arranged as a single entry location, a plurality of spaced entry locations, or a pattern of entry locations corresponding to one or more engagement regions 8 of the lower base undergarment 2.

[0108] In the hero embodiment, the entry points 16 may be provided at a plurality of circumferential locations, including a front-center location, a back-center location, left and right side locations, and optionally additional locations spaced therebetween. Each entry point 16 may be configured as an opening, aperture, slit, notch, cut-out, reinforced hole, buttonhole-type opening, or other access feature sized and shaped to permit releasable engagement with a corresponding latching component associated with the lower base undergarment 2.

[0109] In an example, one or more entry points 16 may include reinforcement structures to resist stretching, fraying, or deformation during repeated use. The entry points 16 shown in connection with the hero embodiment are provided by way of example only and are not limiting.

[0110] Interchangeable Fold Over Member Hero Embodiment—Mini Skirt. The interchangeable member may be implemented as an interchangeable fold over member 22 configured to be worn on a lower body region 4 of a wearer in combination with a lower base undergarment 2.

[0111] In the hero embodiment, the interchangeable fold over member 22 extends circumferentially as a continuous loop around the wearer during use and is configured to align with the waist region 3 of the lower base undergarment 2. As shown in FIGS. 27A-D, the interchangeable fold over member 22 is implemented as a mini skirt fold over member and includes a fold over body portion 23 and an upper region defining an insert portion 14 configured to be removably received within the insert-receiving channel 12 of the lower base undergarment 2.

[0112] In use, the lower base undergarment 2 is worn beneath a lower body garment, and the fold over body portion 23 is positioned externally relative to the lower body garment such that the fold over body portion 23 overlies an upper portion of the lower body garment to provide a fold over layered effect. In the illustrated mini skirt variant, the fold over body portion 23 extends downward to end at or near a thigh region of the wearer.

[0113] In an example, the insert portion 14 extends circumferentially around the interchangeable fold over member 22 and is dimensioned to be received between the inner flap 6 and the outer flap 7 within the insert-receiving channel 12. In an example, the insert portion 14 includes one or more engagement features, including one or more corresponding latching elements 10, one or more entry points 16, and / or a high-friction region 15.

[0114] The interchangeable fold over member 22 may be formed from any suitable textile material, including woven fabrics, knit fabrics, stretch knit fabrics, and combinations thereof. Representative examples include cotton / spandex blends, nylon / spandex blends, fleece constructions, terry constructions, and other elastic or non-elastic textiles. Seams and finishes may include stitching, bonding, taping, or combinations thereof.

[0115] The interchangeable fold over member 22 includes a lower edge region defining a bottom perimeter of the member and an upper region transitioning into the insert portion 14. In an example, the lower edge region may be finished by a folded hem, bound edge, bonded edge, enclosed elastic, or combinations thereof.

[0116] Insert Portion. The insert portion 14 includes an upper portion of the interchangeable fold over member 22 and is configured to be removably received within the insert-receiving channel 12 of a lower base undergarment 2 (FIGS. 27A-B). The insert portion 14 extends along an upper region of the interchangeable fold over member 22 and is dimensioned to be received between the inner flap 6 and the outer flap 7 within the insert-receiving channel 12.

[0117] The insert portion 14 includes opposing first 17 and second flat sides 18 defined by material layers in the insert portion 14 region. When the insert portion 14 is received within the insert-receiving channel 12, the first flat side 17 faces outward away from the wearer and the second flat side 18 faces inward toward the wearer such that the flat sides contact opposing surfaces of the inner flap 6 and the outer flap 7.

[0118] In an example, the insert portion 14 may include a high-friction region 15 disposed on one or both flat sides to increase frictional engagement within the insert-receiving channel 12. In embodiments implementing an Example A latching configuration, the insert portion 14 may include one or more corresponding latching elements 10 positioned to engage one or more latching elements 9 associated with the lower base undergarment 2. In embodiments implementing an Example B latching configuration, the insert portion 14 may include one or more entry points 16 configured to align with latching locations at the engagement region 8 and to permit releasable engagement between latching components associated with the lower base undergarment 2 while the insert portion 14 remains seated within the insert-receiving channel 12.

[0119] Fold Over Body Portion. The fold over body portion 23 includes a visible body portion of the interchangeable fold over member 22 extending from the insert portion 14 and configured to overlie at least a portion of the wearer's lower body during use. In the hero embodiment shown in FIGS. 27A-D, the fold over body portion 23 is implemented as a mini skirt-style portion that extends circumferentially around the wearer and hangs downward from the waist region 3 when the insert portion 14 is received within the insert-receiving channel 12 of the lower base undergarment 2.

[0120] The fold over body portion 23 may be shaped to provide a selected silhouette, including a straight, fitted, flared, pleated, gathered, asymmetric, or other stylized configuration. In an example, the fold over body portion 23 is configured to fold over an upper portion of a lower body garment to create a layered visual effect. The fold over body portion 23 may be formed from one or more fabric panels and may include seams, darts, pleats, lining layers, reinforcement features, and / or decorative details. The mini skirt fold over embodiment is provided by way of example only and is not limiting.

[0121] Corresponding Latching Elements. The insert portion 14 of the interchangeable fold over member 22 may include one or more corresponding latching elements 10 associated with the modular attachment system (FIGS. 27A-B). Releasable coupling at the engagement region 8 may be implemented according to different latching configuration families, including Example A and Example B, and the presence and placement of corresponding latching elements 10 may vary depending on the selected latching example.

[0122] In embodiments implementing an Example A latching configuration, the corresponding latching elements 10 are disposed on the insert portion 14 and are positioned to engage one or more latching elements 9 associated with the lower base undergarment 2 when the insert portion 14 is received within the insert-receiving channel 12. The corresponding latching elements 10 may be disposed on one flat side of the insert portion 14 or on both flat sides of the insert portion 14. The corresponding latching elements 10 may be arranged as a single latching location, a plurality of spaced latching locations, or a generally continuous latching strip extending along at least a portion of the insert portion 14.

[0123] In the hero embodiment, the corresponding latching elements 10 may be provided at a plurality of circumferential locations, including a front-center location, a back-center location, left and right side locations, and optionally additional locations spaced therebetween. The corresponding latching elements 10 may be implemented using any suitable releasable coupling structures, including hook-and-loop, hook-and-eye, snaps, clasps, buttons, magnets, and hybrid combinations thereof. The corresponding latching elements 10 may be secured to the insert portion 14 by any suitable technique, including stitching, bar-tacking, bonding, welding, capture within a seam, or combinations thereof.

[0124] In an example, the insert portion 14 may omit corresponding latching elements 10 and instead include one or more entry points 16 configured to cooperate with latching components associated with the lower base undergarment 2 when the insert portion 14 is seated within the insert-receiving channel 12.

[0125] Entry Points. In an example, the insert portion 14 of the interchangeable fold over member 22 includes one or more entry points 16 associated with the modular attachment system. The entry points 16 may be configured to cooperate with latching components associated with the lower base undergarment 2, for example in embodiments implementing an Example B latching configuration in which releasable engagement occurs while the insert portion 14 remains seated within the insert-receiving channel 12.

[0126] The entry points 16 may be positioned on one or both flat sides of the insert portion 14 or may extend through the thickness of the insert portion 14 at selected latching locations. The entry points 16 may be arranged as a single entry location, a plurality of spaced entry locations, or a pattern of entry locations corresponding to one or more engagement regions 8 of the lower base undergarment 2.

[0127] In the hero embodiment, the entry points 16 may be provided at a plurality of circumferential locations, including a front-center location, a back-center location, left and right side locations, and optionally additional locations spaced therebetween. Each entry point 16 may be configured as an opening, aperture, slit, notch, cut-out, reinforced hole, buttonhole-type opening, or other access feature sized and shaped to permit releasable engagement with a corresponding latching component associated with the lower base undergarment 2.

[0128] In an example, one or more entry points 16 may include reinforcement structures to resist stretching, fraying, or deformation during repeated use. The entry points 16 shown in connection with the hero embodiment are provided by way of example only and are not limiting.

[0129] Interchangeable Underlay Member Hero Embodiment—Medium-Length Button Down. The interchangeable member may be implemented as an interchangeable underlay member 24 configured to be releasably coupled to an upper base undergarment 19 and to extend downward beneath an upper body garment of the wearer so as to provide added coverage and / or a visible underlayer effect.

[0130] In the hero embodiment, the interchangeable underlay member 24 extends circumferentially as a continuous loop around the wearer during use and is configured to align with the band region 20 of the upper base undergarment 19. As shown in FIGS. 38A-B, the interchangeable underlay member 24 is implemented as a medium-length underlay in a button down-style silhouette and includes an underlay body portion 25 and an upper region defining an insert portion 14 configured to be removably received within the insert-receiving channel 12 of the upper base undergarment 19.

[0131] In an example, the insert portion 14 extends circumferentially around the interchangeable underlay member 24 and is dimensioned to be received between the inner flap 6 and the outer flap 7 within the insert-receiving channel 12. In an example, the insert portion 14 includes one or more engagement features, including one or more corresponding latching elements 10, one or more entry points 16, and / or a high-friction region 15.

[0132] The interchangeable underlay member 24 may be formed from any suitable textile material, including woven fabrics, knit fabrics, stretch knit fabrics, and combinations thereof. Representative examples include cotton / spandex blends, nylon / spandex blends, and other elastic or non-elastic textiles. Seams and finishes may include stitching, bonding, taping, or combinations thereof.

[0133] The interchangeable underlay member 24 includes a lower edge region defining a bottom perimeter of the member and an upper region transitioning into the insert portion 14. In an example, the lower edge region may be finished by a folded hem, bound edge, bonded edge, or combinations thereof.

[0134] Insert Portion. The insert portion 14 includes an upper portion of the interchangeable underlay member 24 and is configured to be removably received within the insert-receiving channel 12 of an upper base undergarment 19 (FIG. 38A). The insert portion 14 extends along an upper region of the interchangeable underlay member 24 and is dimensioned to be received between the inner flap 6 and the outer flap 7 within the insert-receiving channel 12.

[0135] The insert portion 14 includes opposing first 17 and second flat sides 18 defined by material layers in the insert portion 14 region. When the insert portion 14 is received within the insert-receiving channel 12, the first flat side 17 faces outward away from the wearer and the second flat side 18 faces inward toward the wearer such that the flat sides contact opposing surfaces of the inner flap 6 and the outer flap 7.

[0136] In an example, the insert portion 14 may include a high-friction region 15 disposed on one or both flat sides to increase frictional engagement within the insert-receiving channel 12. In embodiments implementing an Example A latching configuration, the insert portion 14 may include one or more corresponding latching elements 10 positioned to engage one or more latching elements 9 associated with the upper base undergarment 19. In embodiments implementing an Example B latching configuration, the insert portion 14 may include one or more entry points 16 configured to align with latching locations at the engagement region 8 and to permit releasable engagement between latching components associated with the upper base undergarment 19 while the insert portion 14 remains seated within the insert-receiving channel 12.

[0137] Underlay Body Portion. The underlay body portion 25 includes a visible body portion of the interchangeable underlay member 24 extending from the insert portion 14 and configured to extend downward from the upper base undergarment 19 during use. In the hero embodiment shown in FIGS. 38A-B, the underlay body portion 25 is implemented as a medium-length button-down-style portion that extends circumferentially around the wearer and hangs downward from the torso region when the insert portion 14 is received within the insert-receiving channel 12 of the upper base undergarment 19.

[0138] In an example, the underlay body portion 25 is configured to extend downward beneath an upper body garment of the wearer to provide a layered visual effect, additional coverage, and / or a selected garment appearance. The underlay body portion 25 may be shaped to provide a selected silhouette, including a straight, fitted, flared, draped, layered, curved, asymmetric, or other stylized configuration. The underlay body portion 25 may be formed from one or more fabric panels and may include seams, darts, pleats, collars, plackets, button structures, hems, lining layers, reinforcement features, and / or decorative details. The medium-length button-down-style underlay embodiment is provided by way of example only and is not limiting.

[0139] Corresponding Latching Elements. The insert portion 14 of the interchangeable underlay member 24 may include one or more corresponding latching elements 10 associated with the modular attachment system (FIG. 38A). Releasable coupling at the engagement region 8 may be implemented according to different latching configuration families, including Example A and Example B, and the presence and placement of corresponding latching elements 10 may vary depending on the selected latching example.

[0140] In embodiments implementing an Example A latching configuration, the corresponding latching elements 10 are disposed on the insert portion 14 and are positioned to engage one or more latching elements 9 associated with the upper base undergarment 19 when the insert portion 14 is received within the insert-receiving channel 12. The corresponding latching elements 10 may be disposed on one flat side of the insert portion 14 or on both flat sides of the insert portion 14. The corresponding latching elements 10 may be arranged as a single latching location, a plurality of spaced latching locations, or a generally continuous latching strip extending along at least a portion of the insert portion 14.

[0141] In the hero embodiment, the corresponding latching elements 10 may be provided at a plurality of circumferential locations, including a front-center location, a back-center location, left and right side locations, and optionally additional locations spaced therebetween. The corresponding latching elements 10 may be implemented using any suitable releasable coupling structures, including hook-and-loop, hook-and-eye, snaps, clasps, buttons, magnets, and hybrid combinations thereof. the corresponding latching elements 10 may be secured to the insert portion 14 by any suitable technique, including stitching, bar-tacking, bonding, welding, capture within a seam, or combinations thereof.

[0142] In an example, the insert portion 14 may omit corresponding latching elements 10 and instead include one or more entry points 16 configured to cooperate with latching components associated with the upper base undergarment 19 when the insert portion 14 is seated within the insert-receiving channel 12.

[0143] Entry Points. In an example, the insert portion 14 of the interchangeable underlay member 24 includes one or more entry points 16 associated with the modular attachment system. The entry points 16 may be configured to cooperate with latching components associated with the upper base undergarment 19, for example in embodiments implementing an Example B latching configuration in which releasable engagement occurs while the insert portion 14 remains seated within the insert-receiving channel 12.

[0144] The entry points 16 may be positioned on one or both flat sides of the insert portion 14 or may extend through the thickness of the insert portion 14 at selected latching locations. The entry points 16 may be arranged as a single entry location, a plurality of spaced entry locations, or a pattern of entry locations corresponding to one or more engagement regions 8 of the upper base undergarment 19.

[0145] In the hero embodiment, the entry points 16 may be provided at a plurality of circumferential locations, including a front-center location, a back-center location, left and right side locations, and optionally additional locations spaced therebetween. Each entry point 16 may be configured as an opening, aperture, slit, notch, cut-out, reinforced hole, buttonhole-type opening, or other access feature sized and shaped to permit releasable engagement with a corresponding latching component associated with the upper base undergarment 19.

[0146] In an example, one or more entry points 16 may include reinforcement structures to resist stretching, fraying, or deformation during repeated use. The entry points 16 shown in connection with the hero embodiment are provided by way of example only and are not limiting.

[0147] Interchangeable Tuck Away Member Hero Embodiment—Button Down. The interchangeable member may be implemented as an interchangeable tuck away member 26 including an upper body garment portion and an insert portion 14 configured for releasable coupling to a lower base undergarment 2 so as to retain at least a portion of the upper body garment portion in a tucked configuration during wear.

[0148] In the hero embodiment, the interchangeable tuck away member 26 extends circumferentially around at least a portion of the wearer during use and is configured to align with the waist region 3 of the lower base undergarment 2. As shown in FIGS. 42A-43, the interchangeable tuck away member 26 is implemented as a button down shirt and includes a tuck away body portion 27 and a lower region defining an insert portion 14 configured to be removably received within the insert-receiving channel 12 of the lower base undergarment 2.

[0149] In use, the lower base undergarment 2 is worn beneath a lower body garment, and the tuck away body portion 27 extends upward from the waist region such that at least a lower portion of the tuck away body portion 27 is retained in a tucked configuration relative to the lower base undergarment 2 during wear. In the illustrated hero embodiment, the tuck away body portion 27 extends upward along the torso of the wearer and is configured to present the appearance of a tucked button-down shirt.

[0150] In an example, the insert portion 14 extends circumferentially around the interchangeable tuck away member 26 and is dimensioned to be received between the inner flap 6 and the outer flap 7 within the insert-receiving channel 12. In an example, the insert portion 14 includes one or more engagement features, including one or more corresponding latching elements 10, one or more entry points 16, and / or a high-friction region 15.

[0151] The interchangeable tuck away member 26 may be formed from any suitable textile material, including woven fabrics, knit fabrics, stretch knit fabrics, and combinations thereof. Representative examples include cotton / spandex blends, nylon / spandex blends, and other elastic or non-elastic textiles. Seams and finishes may include stitching, bonding, taping, or combinations thereof.

[0152] The interchangeable tuck away member 26 includes an upper edge region defining an upper perimeter of the member and a lower region transitioning into the insert portion 14. In an example, the upper edge region may be finished in any suitable manner depending on the selected garment style, including a folded hem, bound edge, bonded edge, collar construction, neckline finish, or combinations thereof.

[0153] Insert Portion. The insert portion 14 includes a lower portion of the interchangeable tuck away member 26 and is configured to be removably received within the insert-receiving channel 12 of a lower base undergarment 2. The insert portion 14 extends circumferentially around the interchangeable tuck away member 26 and is dimensioned to be received between the inner flap 6 and the outer flap 7 within the insert-receiving channel 12.

[0154] As shown in FIGS. 42A-43, the insert portion 14 includes opposing first 17 and second flat sides 18 defined by material layers in the insert portion 14 region. When the insert portion 14 is received within the insert-receiving channel 12, the first flat side 17 faces outward away from the wearer and the second flat side 18 faces inward toward the wearer such that the flat sides contact opposing surfaces of the inner flap 6 and the outer flap 7.

[0155] In an example, the insert portion 14 may include a high-friction region 15 disposed on one or both flat sides to increase frictional engagement within the insert-receiving channel 12. In embodiments implementing an Example A latching configuration, the insert portion 14 may include one or more corresponding latching elements 10 positioned to engage one or more latching elements 9 associated with the lower base undergarment 2. In embodiments implementing an Example B latching configuration, the insert portion 14 may include one or more entry points 16 configured to align with latching locations at the engagement region 8 and to permit releasable engagement between latching components associated with the lower base undergarment 2 while the insert portion 14 remains seated within the insert-receiving channel 12.

[0156] Tuck Away Body Portion. The tuck away body portion 27 includes a visible body portion of the interchangeable tuck away member 26 extending from the insert portion 14 and configured to extend upward along at least a portion of the wearer's torso during use (FIGS. 42A-43). In the hero embodiment, the tuck away body portion 27 is implemented as a button down shirt-style portion that extends upward from the waist region when the insert portion 14 is received within the insert-receiving channel 12 of the lower base undergarment 2. In use, at least a lower portion of the tuck away body portion 27 is retained in a tucked configuration relative to the lower base undergarment 2 so as to maintain a selected tucked appearance during wear.

[0157] The tuck away body portion 27 may be shaped to provide a selected silhouette, including a straight, fitted, draped, relaxed, tailored, curved, asymmetric, or other stylized configuration. In an example, the tuck away body portion 27 is configured to extend upward from the lower base undergarment 2 to provide the appearance of a tucked upper body garment and / or to improve positional retention of the garment body during movement. The tuck away body portion 27 may be formed from one or more fabric panels and may include seams, darts, pleats, collars, plackets, button structures, cuffs, hems, sleeve portions, lining layers, reinforcement features, and / or decorative details. The button down shirt embodiment is provided by way of example only and is not limiting.

[0158] Corresponding Latching Elements. The insert portion 14 of the interchangeable tuck away member 26 may include one or more corresponding latching elements 10 associated with the modular attachment system (FIGS. 42A-43). Releasable coupling at the engagement region 8 may be implemented according to different latching configuration families, including Example A and Example B, and the presence and placement of corresponding latching elements 10 may vary depending on the selected latching example.

[0159] In embodiments implementing an Example A latching configuration, the corresponding latching elements 10 are disposed on the insert portion 14 and are positioned to engage one or more latching elements 9 associated with the lower base undergarment 2 when the insert portion 14 is received within the insert-receiving channel 12. The Corresponding latching elements 10 may be disposed on one flat side of the insert portion 14 or on both flat sides of the insert portion 14. The corresponding latching elements 10 may be arranged as a single latching location, a plurality of spaced latching locations, or a generally continuous latching strip extending along at least a portion of the insert portion 14.

[0160] In the hero embodiment, the corresponding latching elements 10 may be provided at a plurality of circumferential locations, including a front-center location, a back-center location, left and right side locations, and optionally additional locations spaced therebetween. The corresponding latching elements 10 may be implemented using any suitable releasable coupling structures, including hook-and-loop, hook-and-eye, snaps, clasps, buttons, magnets, and hybrid combinations thereof. The corresponding latching elements 10 may be secured to the insert portion 14 by any suitable technique, including stitching, bar-tacking, bonding, welding, capture within a seam, or combinations thereof.

[0161] In an example, the insert portion 14 may omit corresponding latching elements 10 and instead include one or more entry points 16 configured to cooperate with latching components associated with the lower base undergarment 2 when the insert portion 14 is seated within the insert-receiving channel 12.

[0162] Entry Points. In an example, the insert portion 14 of the interchangeable tuck away member 26 includes one or more entry points 16 associated with the modular attachment system. The entry points 16 may be configured to cooperate with latching components associated with the lower base undergarment 2, for example in embodiments implementing an Example B latching configuration in which releasable engagement occurs while the insert portion 14 remains seated within the insert-receiving channel 12.

[0163] The entry points 16 may be positioned on one or both flat sides of the insert portion 14 or may extend through the thickness of the insert portion 14 at selected latching locations. The entry points 16 may be arranged as a single entry location, a plurality of spaced entry locations, or a pattern of entry locations corresponding to one or more engagement regions 8 of the lower base undergarment 2.

[0164] In the hero embodiment, the entry points 16 may be provided at a plurality of circumferential locations, including a front-center location, a back-center location, left and right side locations, and optionally additional locations spaced therebetween. Each entry point 16 may be configured as an opening, aperture, slit, notch, cut-out, reinforced hole, buttonhole-type opening, or other access feature sized and shaped to permit releasable engagement with a corresponding latching component associated with the lower base undergarment 2.

[0165] In an example, one or more entry points 16 may include reinforcement structures to resist stretching, fraying, or deformation during repeated use. The entry points 16 shown in connection with the hero embodiment are provided by way of example only and are not limiting.Modular Attachment System.

[0166] System Overview. The modular attachment system is configured to releasably connect a base undergarment and an interchangeable member. The modular attachment system permits repeated attachment and detachment of an interchangeable member relative to a base undergarment over multiple attachment and detachment cycles. In the embodiments described herein, the modular attachment system is positioned at a designated interface region of the base undergarment and at a corresponding edge region of the interchangeable member, with the location of the modular attachment system varying according to the construction and intended pairing of the respective components.

[0167] The modular attachment system may be implemented across different disclosed embodiment pairings. In an assembled condition, an insert portion 14 of the interchangeable member is received within an insert-receiving channel 12 defined by channel-forming flaps 5 of the base undergarment so as to position the interchangeable member relative to the base undergarment at the interface (FIGS. 12A-B).

[0168] Retention may be provided by structural capture of the insert portion 14 within the insert-receiving channel 12, frictional engagement between interfacing components, releasable latching engagement at an engagement region 8, or combinations thereof. Releasable coupling may be implemented using different latching families, including Example A and Example B configurations described herein, while still permitting intentional manual release.

[0169] Embodiment Pairings & Interface Regions. The modular attachment system may be implemented across different compatible pairings of base undergarments and interchangeable members, with the location of the interface varying according to the construction and intended pairing of the respective components.

[0170] In embodiments including a lower base undergarment 2, the modular attachment system is positioned at a waist region 3 of the lower base undergarment 2 (FIGS. 2-7). In such embodiments, the corresponding interchangeable member may include an interface-defining region positioned at either a lower region or an upper region of the interchangeable member, depending on the particular member type. For example, the interchangeable waistband member 1 includes the modular attachment system at a lower region thereof, the interchangeable fold over member 22 includes the modular attachment system at an upper region thereof, and the interchangeable tuck away member 26 includes the modular attachment system at a lower region thereof. In an example, the interchangeable waistband member 1 may be permanently affixed to the lower base undergarment 2 at or adjacent to the engagement region 8 by stitching, bonding, welding, or another permanent attachment technique, such that the interchangeable waistband member 1 is fixed relative to the lower base undergarment 2 rather than removably coupled thereto (FIGS. 48A-B).

[0171] In embodiments including an upper base undergarment 19, the modular attachment system is positioned at a band region 20 of the upper base undergarment 19 (FIGS. 31A-34C). In such embodiments, the interchangeable underlay member 24 includes the modular attachment system at an upper region thereof for releasable coupling with the upper base undergarment 19.

[0172] Accordingly, the disclosed pairings are defined such that the interface region of each base undergarment corresponds to a compatible edge region of the associated interchangeable member. In this manner, the lower base undergarment 2 is configured for pairing with the interchangeable waistband member 1, the interchangeable fold over member 22, and the interchangeable tuck away member 26, while the upper base undergarment 19 is configured for pairing with the interchangeable underlay member 24.

[0173] Assembled Condition. In an assembled condition, the interchangeable member is attached to the base undergarment such that the respective components are positioned in operative relationship to one another at the modular attachment system (referring to hero embodiment examples, FIGS. 1A-D). In the assembled condition, an insert portion 14 of the interchangeable member is received within an insert-receiving channel 12 of the base undergarment, the insert-receiving channel 12 being defined by the channel-forming flaps 5 of the base undergarment. Receipt of the insert portion 14 within the insert-receiving channel 12 establishes positioning of the interchangeable member relative to the base undergarment and maintains alignment of the paired components at the interface during wear.

[0174] In an example, the assembled condition further includes releasable engagement at an engagement region 8 such that one or more latching-related components, friction-enhancing components, and / or structurally cooperating interface components act together to retain the interchangeable member relative to the base undergarment while still permitting intentional manual detachment. In the assembled condition, the interchangeable member and the base undergarment cooperate to present a selected aesthetic appearance, functional coverage arrangement, garment layering effect, and / or positional retention function, depending on the selected embodiment pairing.

[0175] The assembled condition shown in the drawings is illustrative only and is not limiting. For example, in some figures the assembled condition is shown using the lower base undergarment 2 and the interchangeable waistband member 1 hero embodiments (FIGS. 1A-D), although the same system principles may be implemented in other compatible pairings disclosed herein, including pairings of the Lower base undergarment 2 with an interchangeable fold over member 22 or an interchangeable tuck away member 26, and pairings of the upper base undergarment 19 with an interchangeable underlay member 24.

[0176] Detached Condition. In a detached condition, the interchangeable member is separated from the base undergarment such that the respective components are no longer coupled to one another at the modular attachment system. In the detached condition, the insert portion 14 of the interchangeable member is not received within the insert-receiving channel 12 of the base undergarment, and the base undergarment and the interchangeable member remain separate and independently positionable relative to one another.

[0177] Although the components are separated in the detached condition, the modular attachment system remains configured to permit subsequent alignment and reattachment of the interchangeable member relative to the base undergarment. For example, the insert portion 14 remains configured for subsequent insertion into the insert-receiving channel 12, and the interface components remain arranged such that the interchangeable member may later be repositioned into an assembled condition through a subsequent attachment sequence.

[0178] Closed Configuration. In a closed configuration, the outer flap 7 overlies the inner flap 6 such that the insert-receiving channel 12 is covered and at least partially enclosed (FIGS. 2-4, FIGS. 31A-C, and FIGS. 33A-C). In this configuration, the outer flap 7 is positioned relative to the inner flap 6 so as to restrict access to the opening region of the insert-receiving channel 12. The closed configuration may be maintained by the inherent positioning of the outer flap 7, by elastic recovery of one or more interface components, by engagement of latching-related components, or by combinations thereof.

[0179] When an insert portion 14 of an interchangeable member is received within the insert-receiving channel 12, the closed configuration may assist in retaining the insert portion 14 within the insert-receiving channel 12 during wear by maintaining coverage over the opening region and by preserving the positional relationship between the channel-forming flaps 5 and the insert portion 14. In an example, the closed configuration further places one or more interface components in aligned relationship at the engagement region 8 such that releasable latching may occur in this state when latching components are present.

[0180] Open Configuration. In an open configuration, the outer flap 7 is displaced relative to the inner flap 6 such that the opening region of the insert-receiving channel 12 is exposed (FIGS. 5-7, FIGS. 32A-C, and FIGS. 34A-C). In this configuration, the outer flap 7 is repositioned away from the inner flap 6, for example by folding, pivoting, or otherwise moving about a hinge zone 11, such that access is provided to the insert-receiving channel 12. The open configuration thereby permits insertion of the insert portion 14 into the insert-receiving channel 12 and withdrawal of the insert portion 14 from the insert-receiving channel 12.

[0181] The open configuration may be used during attachment of an interchangeable member to a base undergarment and during detachment of an interchangeable member from a base undergarment. In an example, the open configuration also exposes one or more interface components at or adjacent to the engagement region 8 so as to facilitate alignment, engagement, disengagement, inspection, or manual manipulation of the modular attachment system. Once insertion, withdrawal, or other intended manipulation has been completed, the outer flap 7 may be returned toward the inner flap 6 so that the modular attachment system transitions from the open configuration to the closed configuration.Channel-Forming Components.

[0182] Inner Flap. The modular attachment system includes an inner flap 6 positioned on a body-facing side of the base undergarment such that, in use, the inner flap 6 contacts the wearer's body (FIGS. 5-7, FIGS. 32A-C, and FIGS. 34A-C). The inner flap 6 is secured to the base undergarment along at least one attachment line at a designated interface region of the base undergarment, for example by stitching, bonding, capture within a seam, or combinations thereof. In an example, the inner flap 6 may be formed from an elastic material or elastic band construction and may optionally be wrapped in the same fabric as the base undergarment.

[0183] In an example, the inner flap 6 includes elastic reinforcement and is configured to lie flat against the wearer during use, thereby promoting conformability and reducing rolling, folding, or displacement of interface components. A channel-facing side of the inner flap 6 may optionally include a high-friction region 15 configured to increase frictional engagement with an insert portion 14 received within the insert-receiving channel 12. The inner flap 6 defines one side of the insert-receiving channel 12 and cooperates with the outer flap 7 to receive and retain the insert portion 14 of a compatible interchangeable member.

[0184] Outer Flap. The modular attachment system further includes an outer flap 7 positioned opposite the inner flap 6 and configured to move relative thereto between an open configuration and a closed configuration (FIGS. 2-7 and FIGS. 31A-34C). The outer flap 7 is arranged such that, in the closed configuration, the outer flap 7 overlies the inner flap 6 and covers at least a portion of the insert-receiving channel 12, while in the open configuration the outer flap 7 is displaced relative to the inner flap 6 to expose an opening region of the insert-receiving channel 12.

[0185] The outer flap 7 may be secured to the base undergarment along an attachment region that permits flap movement, as described further with respect to the hinge zone 11. In an example, the outer flap 7 may be formed from an elastic material or elastic band construction and may optionally be wrapped in the same fabric as the base undergarment. The outer flap 7 may further include a free edge positioned opposite the hinge zone 11, and the free edge may include a folded hem, a bound edge, a bonded edge, elastic reinforcement, tape reinforcement, or combinations thereof to maintain edge stability.

[0186] In an example, a channel-facing side of the outer flap 7 may include a high-friction region 15 configured to increase frictional engagement with the insert portion 14. The outer flap 7 defines an opposite side of the insert-receiving channel 12 and cooperates with the inner flap 6 to at least partially enclose the insert portion 14 when the modular attachment system is in the closed configuration.

[0187] Hinge Zone. The modular attachment system further includes a hinge zone 11 at which the outer flap 7 is attached relative to the base undergarment such that the outer flap 7 is movable relative to the inner flap 6 (FIGS. 5-7, FIGS. 32A-C and FIGS. 34A-C). The hinge zone 11 permits repositioning of the outer flap 7 between the open configuration and the closed configuration and thereby facilitates selective exposure and coverage of the insert-receiving channel 12.

[0188] The hinge zone 11 may be implemented in any suitable manner that permits repeated movement of the outer flap 7 relative to the inner flap 6 over multiple attachment and detachment cycles. By way of example and not limitation, the hinge zone 11 may be formed by a fold over construction, a stitched hinge seam, a bonded hinge line, an elastic hinge tape, or combinations thereof. In an example, the hinge zone 11 may be integrated into an elastic band structure, a folded material region, a seam-defined transition region, or another flexible attachment region configured to permit movement of the outer flap 7 while maintaining attachment to the base undergarment.

[0189] Insert-Receiving Channel. The insert-receiving channel 12 is defined as a space between the inner flap 6 and the outer flap 7 of the base undergarment and is configured to removably receive an insert portion 14 of an interchangeable member (FIGS. 5-7, FIGS. 32A-C and FIGS. 34A-C). The insert-receiving channel 12 includes an opening region through which the insert portion 14 may be inserted into and withdrawn from the insert-receiving channel 12 during attachment and detachment of the interchangeable member relative to the base undergarment.

[0190] In different embodiments, the insert-receiving channel 12 may extend around at least a portion of a selected interface region of the base undergarment, including at least a portion of a waist region 3 of a lower base undergarment 2 or at least a portion of a band region 20 of an upper base undergarment 19. The insert-receiving channel 12 has a height and a depth sized to receive the insert portion 14 while permitting insertion, seating, and retention thereof within the modular attachment system.

[0191] When the insert portion 14 is received within the insert-receiving channel 12, contact between the insert portion 14 and opposing channel-forming surfaces of the inner flap 6 and the outer flap 7 may contribute to retention of the insert portion 14 within the modular attachment system during wear. In an example, elastic tension, material recovery, and / or conforming contact within the insert-receiving channel 12 may further increase retention by resisting relative movement of the insert portion 14 after insertion.

[0192] Insert Portion. The insert portion 14 is a portion of the interchangeable member configured to be received within the insert-receiving channel 12 of the base undergarment and to participate in releasable coupling of the interchangeable member to the base undergarment (FIGS. 8-10, FIGS. 27A-B, FIG. 38A and FIGS. 42A-C). The location of the insert portion 14 may vary depending on the type of interchangeable member. In an example, the insert portion 14 is located at a lower region of the interchangeable member, for example in an interchangeable waistband member 1 or an interchangeable tuck away member 26. In other embodiments, the insert portion 14 is located at an upper region of the interchangeable member, for example in an interchangeable fold over member 22 or an interchangeable underlay member 24.

[0193] The insert portion 14 may include opposing first 17 and second flat sides 18 defined by material layers in the insert portion 14 region. When the insert portion 14 is received within the insert-receiving channel 12, the opposing flat sides are positioned to contact opposing surfaces of the inner flap 6 and the outer flap 7. In this manner, the insert portion 14 functions as the portion of the interchangeable member that is insertable into, removable from, and retainable within the modular attachment system.

[0194] In an example, the insert portion 14 may further include one or more corresponding latching elements 10, one or more entry points 16, a high-friction region 15, or combinations thereof. The particular features present on the insert portion 14 may vary depending on the selected latching example, desired retention characteristics, and the construction of the associated interchangeable member.

[0195] Engagement Region. As used herein, an engagement region 8 refers to a designated region of the modular attachment system at which engagement, alignment, and / or retention between components occurs during use (FIGS. 14C-F, FIGS. 30D-H, FIGS. 41C-F and FIGS. 47C-G). The engagement region 8 is defined relative to the base undergarment and serves as a consistent interface reference for identifying where releasable coupling and associated component interaction occur.

[0196] In a closed configuration, the engagement region 8 may include one or more overlapping, aligned, and / or adjacent interface components, including portions of the inner flap 6, the outer flap 7, and the insert portion 14, and may further include one or more latching-related components where releasable coupling occurs. In an open configuration, the engagement region 8 continues to refer to the same general interface location even though the outer flap 7 has been displaced relative to the inner flap 6, and may thereby serve as a reference region for insertion, alignment, latching, unlatching, and other interface interactions. In a detached condition, the engagement region 8 remains defined relative to the base undergarment even though the interchangeable member is separated from the base undergarment and the insert portion 14 is not received within the insert-receiving channel 12.

[0197] High-Friction Region. In an example, a high-friction region 15 may be provided as an optional feature of the modular attachment system to increase frictional engagement between interfacing components (FIG. 11). The high-friction region 15 may be disposed on one or both flat sides of the insert portion 14, on a channel-facing side of the inner flap 6, on a channel-facing side of the outer flap 7, or on any combination thereof.

[0198] When present, the high-friction region 15 is configured to increase frictional engagement between the insert portion 14 and one or more opposing surfaces within the insert-receiving channel 12, thereby helping to resist relative sliding, shifting, and / or withdrawal of the insert portion 14 during wear. In an example, the high-friction region 15 acts in combination with structural capture and / or releasable latching to improve retention of the interchangeable member relative to the base undergarment.

[0199] The high-friction region 15 may be implemented in any suitable manner, including printed elastomer features, silicone features, a textured coating, a friction-enhancing film, a grippy tape, a high-friction textile structure, or combinations thereof.

[0200] In an example, the high-friction region 15 may extend continuously along one or more portions of the insert portion 14, the inner flap 6, and / or the outer flap 7. In other embodiments, the high-friction region 15 may be localized to selected regions of the interface. In still other embodiments, the high-friction region 15 may be omitted where sufficient retention is provided by other aspects of the modular attachment system.

[0201] Retention Mechanisms. Retention of an interchangeable member relative to a base undergarment may be achieved in any suitable manner within the modular attachment system, including structural retention, frictional retention, latching retention, or combinations thereof. The particular retention mechanism or combination of mechanisms may vary depending on the embodiment pairing, material construction, and selected interface features.

[0202] Structural retention may be provided by physical capture of the insert portion 14 within the insert-receiving channel 12. For example, opposing channel-forming surfaces of the inner flap 6 and the outer flap 7 may constrain the insert portion 14 when it is received within the insert-receiving channel 12, thereby resisting displacement and maintaining positional alignment during wearer movement.

[0203] Frictional retention may be provided by contact pressure between the insert portion 14 and the channel-forming surfaces of the inner flap 6 and the outer flap 7, optionally enhanced by one or more high-friction regions 15. Such frictional retention may resist relative sliding or withdrawal of the insert portion 14 within the insert-receiving channel 12 during use.

[0204] Latching retention may be provided by engagement of one or more latching components at the engagement region 8, including direct engagement between mating latching components or engagement through one or more entry points 16 depending on the selected latching example. In an example, the modular attachment system may employ multiple retention mechanisms simultaneously such that structural retention, frictional retention, and latching retention collectively contribute to maintaining the interchangeable member in a selected position relative to the base undergarment during wear.Latching Configurations.

[0205] Example A. In embodiments implementing this example latching configuration, releasable coupling is achieved through direct engagement between one or more latching elements 9 associated with the base undergarment and one or more corresponding latching elements 10 associated with the insert portion 14 of the interchangeable member (FIGS. 14A-141). In such embodiments, the latching elements 9 and the corresponding latching elements 10 are configured to mate directly with one another at one or more locations of the engagement region 8 when the insert portion 14 is received within the insert-receiving channel 12.

[0206] The latching elements 9 associated with the base undergarment may be positioned at any suitable locations, including front-center, back-center, side locations, or other spaced locations along the relevant interface region. Similarly, the corresponding latching elements 10 associated with the insert portion 14 may be positioned at corresponding locations such that direct mating engagement occurs when the paired components are aligned and assembled.

[0207] The latching elements 9 and corresponding latching elements 10 of an Example A configuration may be implemented using any suitable releasable coupling structures, including buttons, snaps, hook-and-loop structures, hook-and-eye structures, clasps, magnets, and hybrid combinations thereof (FIGS. 13A-J). Any latching structure shown in the drawings is provided by way of example only and is not limiting.

[0208] Example B. In embodiments implementing this example latching configuration, releasable coupling occurs while the insert portion 14 remains seated within the insert-receiving channel 12 (FIGS. 16A-I). In such embodiments, the insert portion 14 includes one or more entry points 16 aligned at the engagement region 8 with one or more latching elements 9 associated with the base undergarment. As the outer flap 7 is moved toward the closed configuration, one or more corresponding latching elements 10 associated with the outer flap 7 engage the one or more latching elements 9 through the one or more entry points 16, thereby releasably coupling the interchangeable member to the base undergarment.

[0209] The one or more latching elements 9 may be positioned at any suitable locations along the relevant interface region, including front-center, back-center, side locations, or other spaced locations. In an example, the one or more latching elements 9 are disposed on the inner flap 6 and the one or more corresponding latching elements 10 are disposed on the outer flap 7.

[0210] The one or more entry points 16 may be configured as openings, slits, cut-outs, apertures, notches, reinforced holes, buttonhole-type openings, or other access features sized and shaped to permit releasable engagement through the insert portion 14 while the insert portion 14 remains received within the insert-receiving channel 12. In an example, one or more entry points 16 may include reinforcement structures configured to resist stretching, deformation, fraying, or wear over repeated use.

[0211] The latching components of an Example B configuration may be implemented using any suitable releasable coupling structures, including buttons, snaps, key-and-keyhole structures, hooking structures, clasping structures, magnets, and hybrid combinations thereof (FIGS. 15A-C). Any Example B arrangement shown in the drawings is provided by way of example only and is not limiting.Attachment & Detachment Sequences.

[0212] General Attachment & Detachment Sequence. Attachment of an interchangeable member to a base undergarment may be carried out by first moving the outer flap 7 to the open configuration so as to expose the opening region of the insert-receiving channel 12. The insert portion 14 of the interchangeable member may then be aligned with the insert-receiving channel 12 and inserted into the insert-receiving channel 12 through the opening region. After insertion, the insert portion 14 may be advanced and seated within the insert-receiving channel 12 such that the interface components are aligned at the engagement region 8.

[0213] Where latching components are present, attachment may further include engaging one or more latching-related components at the engagement region 8. Thereafter, where applicable, the outer flap 7 may be returned toward the inner flap 6 so that the modular attachment system transitions to the closed configuration and the insert portion 14 is covered and retained within the insert-receiving channel 12.

[0214] Detachment of the interchangeable member from the base undergarment may be carried out by first moving the outer flap 7 to the open configuration, where needed, to expose the opening region of the insert-receiving channel 12. Where latching components are present, detachment may further include disengaging the latching-related components at the engagement region 8. The insert portion 14 may then be withdrawn from the insert-receiving channel 12 through the opening region, thereby separating the interchangeable member from the base undergarment and returning the modular attachment system to a detached condition.

[0215] Representative Sequence: Lower Base Undergarment & Interchangeable Waistband Member (Example A). A representative attachment and detachment sequence for the hero embodiments of the lower base undergarment 2 and the interchangeable waistband member 1 in an Example A latching configuration is shown in FIGS. 14A-I. In this sequence, the interchangeable waistband member 1 is releasably coupled to the lower base undergarment 2 by direct engagement between one or more latching elements 9 of the lower base undergarment 2 and one or more corresponding latching elements 10 of the insert portion 14 while the insert portion 14 is received within the insert-receiving channel 12.

[0216] Attachment may begin with the components separate and the lower base undergarment 2 in the closed configuration, as shown in FIG. 14A. The outer flap 7 may be moved about the hinge zone 11 to expose the opening region of the insert-receiving channel 12, as shown in FIG. 14B. The insert portion 14 may then be aligned with and inserted into the insert-receiving channel 12 so as to become seated therein, with the corresponding latching elements 10 aligned for direct engagement with the latching elements 9, as shown in FIG. 14C. As shown in FIGS. 14D-E, direct mating engagement may occur at a plurality of circumferential locations of the engagement region 8.

[0217] Once the insert portion 14 is seated and the Example A latching components are engaged, the outer flap 7 may be returned toward the closed configuration, as shown in FIG. 14F. The attached condition is shown in FIGS. 14G-I, in which the insert portion 14 remains seated, the corresponding latching elements 10 remain engaged with the latching elements 9, and the outer flap 7 overlies the opening region to cover and at least partially enclose the interface.

[0218] Detachment may be carried out by reversing the foregoing sequence, including moving the outer flap 7 to the open configuration, disengaging the latching elements 9 and corresponding latching elements 10, and withdrawing the insert portion 14 from the insert-receiving channel 12.

[0219] Representative Sequence: Lower Base Undergarment & Interchangeable Waistband Member (Example B). A representative attachment and detachment sequence for the hero embodiments of the lower base undergarment and the interchangeable waistband member 1 in an Example B latching configuration is shown in FIGS. 16A-I. In this sequence, the interchangeable waistband member 1 is releasably coupled to the lower base undergarment 2 while the insert portion 14 remains seated within the insert-receiving channel 12, with one or more entry points 16 aligned with one or more latching elements 9 and with releasable engagement occurring at the engagement region 8 as the outer flap 7 is repositioned toward the closed configuration.

[0220] Attachment may begin with the components separate and the lower base undergarment 2 in the closed configuration, as shown in FIG. 16A. The outer flap 7 may then be moved about the hinge zone 11 to expose the opening region of the insert-receiving channel 12, as shown in FIG. 16B. The insert portion 14 may be aligned with and inserted into the insert-receiving channel 12 so as to become seated therein, with the entry points 16 registered with the latching elements 9, as shown in FIGS. 16C-D. As shown in FIG. 16E, once the insert portion 14 is seated, the outer flap 7 may be repositioned such that at least one corresponding latching element 10 associated with the outer flap 7 releasably engages at least one registered latching element 9 at the engagement region 8. The outer flap 7 may then continue toward the closed configuration, as shown in FIG. 16F.

[0221] The attached condition is shown in FIGS. 16G-I, in which the insert portion 14 remains seated within the insert-receiving channel 12, the outer flap 7 overlies the opening region, and releasable engagement has occurred through the Example B arrangement at the engagement region 8.

[0222] Detachment may be carried out by reversing the foregoing sequence, including moving the outer flap 7 away from the inner flap 6 to expose the interface, disengaging the Example B latching arrangement, and withdrawing the insert portion 14 from the insert-receiving channel 12.

[0223] Representative Sequence: Lower Base Undergarment & Interchangeable Fold Over Member. A representative attachment and detachment sequence for the hero embodiments of the lower base undergarment 2 and the interchangeable fold over member 22 in an Example B latching configuration is shown in FIGS. 30A-L. In this sequence, the interchangeable fold over member 22 is releasably coupled to the lower base undergarment 2 while the insert portion 14 remains seated within the insert-receiving channel 12, with one or more entry points 16 aligned with one or more latching elements 9 and with releasable engagement occurring at the engagement region 8 as the outer flap 7 is repositioned toward the closed configuration.

[0224] Attachment may begin with the wearer wearing the lower base undergarment 2 in the closed configuration, as shown in FIG. 30A. The outer flap 7 may be moved about the hinge zone 11 to expose the opening region of the insert-receiving channel 12 and the latching components, as shown in FIG. 30B. The interchangeable fold over member 22 may then be positioned with the insert portion 14 aligned with the insert-receiving channel 12 and the entry points 16 aligned for registration with the latching elements 9, while the wearer holds the fold over body portion 23 upward to access the waist interface, as shown in FIG. 30C. The insert portion 14 may then be inserted and seated within the insert-receiving channel 12, with the entry points 16 registered with the latching elements 9 at the engagement region 8, as shown in FIGS. 30D-E. As shown in FIG. 30F, the outer flap 7 may then be repositioned so that the Example B latching arrangement engages at the engagement region 8.

[0225] The attached waist-interface condition is shown in FIGS. 30G-H. After attachment, a lower body garment may be worn over the lower base undergarment 2, as shown in FIG. 301, and the fold over body portion 23 may then be folded downward over an upper portion of the lower body garment, as shown in FIG. 30J. The fully assembled condition is shown in FIGS. 30K-L, in which the fold over body portion 23 is folded over and positioned externally on the lower body garment.

[0226] Detachment may be carried out by reversing the foregoing sequence, including lifting the fold over body portion 23 to access the waist interface, moving the outer flap 7 to expose the interface and disengage the Example B latching arrangement, and withdrawing the insert portion 14 from the insert-receiving channel 12.

[0227] Representative Sequence: Upper Base Undergarment & Interchangeable Underlay Member. A representative attachment and detachment sequence for the hero embodiments of the upper base undergarment 19 and the interchangeable underlay member 24 in an Example A latching configuration is shown in FIGS. 41A-J. In this sequence, the interchangeable underlay member 24 is releasably coupled to the upper base undergarment 19 by direct engagement between one or more latching elements 9 of the upper base undergarment 19 and one or more corresponding latching elements 10 of the insert portion 14 while the insert portion 14 is received within the insert-receiving channel 12.

[0228] Attachment may begin with the upper base undergarment 19 in the closed configuration, as shown in FIG. 41A. The outer flap 7 may be moved about the hinge zone 11 to expose the opening region of the insert-receiving channel 12, as shown in FIG. 41B. The interchangeable underlay member 24 may then be positioned adjacent to the band region 20 with the insert portion 14 aligned with the insert-receiving channel 12 and the corresponding latching elements 10 aligned for direct engagement with the latching elements 9. The insert portion 14 may then be inserted into and seated within the insert-receiving channel 12 at the engagement region 8, as shown in FIG. 41C. As shown in FIGS. 41D-E, direct mating engagement of the Example A latching components may occur at a plurality of circumferential locations.

[0229] Once the insert portion 14 is seated and the latching components are engaged, the outer flap 7 may be returned toward the closed configuration, as shown in FIG. 41F. The attached condition is shown in FIGS. 41G-H, in which the insert portion 14 remains seated, the corresponding latching elements 10 remain engaged with the latching elements 9, and the outer flap 7 overlies the opening region to cover and at least partially enclose the interface. As shown in FIGS. 41I-J, an upper body garment may then be worn over the upper base undergarment 19 and an upper region of the underlay body portion 25 so that the interchangeable underlay member 24 extends downward beneath the upper body garment.

[0230] Detachment may be carried out by reversing the foregoing sequence, including lifting or removing any upper body garment as needed to access the band-region interface, moving the outer flap 7 to the open configuration, disengaging the latching elements 9 and corresponding latching elements 10, and withdrawing the insert portion 14 from the insert-receiving channel 12.

[0231] Representative Sequence: Lower Base Undergarment & Interchangeable Tuck Away Member. A representative attachment and detachment sequence for another example of the lower base undergarment 2 configured as a trunk silhouette and the hero embodiment of the interchangeable tuck away member 26 in an Example A latching configuration is shown in FIGS. 47A-K. In this sequence, the interchangeable tuck away member 26 is releasably coupled to the lower base undergarment 2 by direct engagement between one or more latching elements 9 of the lower base undergarment 2 and one or more corresponding latching elements 10 of the insert portion 14 while the insert portion 14 is received within the insert-receiving channel 12.

[0232] Attachment may begin with the lower base undergarment 2 in the closed configuration, as shown in FIG. 47A. The outer flap 7 may then be moved about the hinge zone 11 to expose the opening region of the insert-receiving channel 12 and the latching elements 9 on the inner flap 6, as shown in FIG. 47B. The interchangeable tuck away member 26 may then be positioned such that the insert portion 14 is inserted into and seated within the insert-receiving channel 12, with the corresponding latching elements 10 aligned for direct engagement with the latching elements 9 at the engagement region 8, as shown in FIG. 47C. As shown in FIGS. 47D-F, direct mating engagement of the Example A latching components may occur at one or more locations along the engagement region 8.

[0233] Once the insert portion 14 is seated and the latching components are engaged, the outer flap 7 may be returned toward the closed configuration, as shown in FIG. 47G. The attached condition is shown in FIGS. 47H-I, in which the Insert Portion 14 remains seated, the corresponding latching elements 10 remain engaged with the latching elements 9, and the outer flap 7 overlies the opening region to cover and at least partially enclose the interface. As shown in FIGS. 47J-K, a lower body garment may then be worn over the lower base undergarment 2 while the tuck away body portion 27 remains visible above the lower body garment so as to provide the appearance and / or function of a tucked upper body garment.

[0234] Detachment may be carried out by reversing the foregoing sequence, including adjusting any lower body garment as needed to access the waist-region interface, moving the outer flap 7 to the open configuration, disengaging the latching elements 9 and corresponding latching elements 10, and withdrawing the insert portion 14 from the insert-receiving channel 12.

[0235] Other Examples. The modular attachment system is described herein with reference to multiple embodiments to illustrate representative implementations of the base undergarment and the interchangeable member and to demonstrate interchangeability of the separable components.

[0236] The disclosed embodiments show that the base undergarment and the interchangeable member may be implemented in different silhouettes, materials, and external geometries while remaining compatible through the same modular attachment system. This permits a wearer to selectively couple a chosen interchangeable member to a compatible base undergarment and to replace that interchangeable member with another through repeated attachment and detachment cycles. Any base undergarment variant and any interchangeable member variant may be configured for an Example A latching configuration, an Example B latching configuration, or both, depending on the selected interface arrangement.

[0237] Lower Base Undergarment Variants. Each lower base undergarment 2 variant may include an inner flap 6, an outer flap 7, and an insert-receiving channel 12 defined therebetween. In an example, a high-friction region 15 may be disposed on a channel-facing side of the inner flap 6 and / or the outer flap 7, and in other embodiments the high-friction region 15 may be omitted.

[0238] Each lower base undergarment 2 variant may further include one or more latching elements 9 arranged according to an Example A latching configuration, an Example B latching configuration, or both, as described herein.

[0239] Thong. In another example, the lower base undergarment 2 is configured as a thong silhouette, as shown in FIGS. 17A-B. The thong embodiment provides reduced rear coverage with a narrow rear portion and leg openings configured for reduced material coverage along the buttock region relative to the boyshort hero embodiment. The waist-region interface portion of the modular attachment system may be substantially the same as described for the hero embodiment, with minor proportional adjustments to accommodate the thong silhouette while maintaining compatibility with an interchangeable member.

[0240] Cheeky. In another example, the lower base undergarment 2 is configured as a cheeky silhouette, as shown in FIGS. 18A-B. The cheeky embodiment provides reduced lower-body coverage with higher-cut leg openings and a reduced seat coverage profile relative to the boyshort hero embodiment. The waist-region interface portion of the modular attachment system may be substantially the same as described for the hero embodiment, with minor proportional adjustments to accommodate the cheeky silhouette while maintaining compatibility with an interchangeable member.

[0241] Brief. In another example, the lower base undergarment 2 is configured as a brief silhouette, as shown in FIGS. 19A-B. The brief embodiment provides a higher leg opening and a front coverage profile suitable for a male wearer, with a reduced leg length relative to trunk and boxer brief silhouettes. The waist-region interface portion of the modular attachment system may be substantially the same as described for the hero embodiment, with minor proportional adjustments to accommodate the brief silhouette while maintaining compatibility with an interchangeable member.

[0242] Trunk. In another example, the lower base undergarment 2 is configured as a trunk silhouette, as shown in FIGS. 20A-B. The trunk embodiment provides increased leg length and a lower leg opening position relative to the brief embodiment, with a generally straight leg opening profile extending partially down the upper thigh. The waist-region interface portion of the modular attachment system may be substantially the same as described for the hero embodiment, with minor proportional adjustments to accommodate the trunk silhouette while maintaining compatibility with an interchangeable member.

[0243] Boxer Brief. In another example, the lower base undergarment 2 is configured as a boxer brief silhouette, as shown in FIGS. 21A-B. The boxer brief embodiment provides further increased leg length and extended lower-body coverage down the thigh relative to the trunk embodiment. The waist-region interface portion of the modular attachment system may be substantially the same as described for the hero embodiment, with minor proportional adjustments to accommodate the boxer brief silhouette while maintaining compatibility with an interchangeable member.

[0244] Upper Base Undergarment Variants. Each upper base undergarment 19 variant may include an inner flap 6, an outer flap 7, and an insert-receiving channel 12 defined therebetween. In an example, a high-friction region 15 may be disposed on a channel-facing side of the inner flap 6 and / or the outer flap 7, and in other embodiments the high-friction region 15 may be omitted.

[0245] Each upper base undergarment 19 variant may further include one or more latching elements 9 arranged according to an Example A latching configuration, an Example B latching configuration, or both, as described herein.

[0246] Underwire Bra. In another example, the upper base undergarment 19 is configured as an underwire bra silhouette, as shown in FIGS. 35A-B. The underwire bra embodiment provides a more structured upper-body garment configuration than the bralette hero embodiment, including chest-covering portions shaped to define respective cups, one or more underwire support elements extending along lower regions of the cups, and a central front region positioned between the cups. In an example, the underwire bra embodiment may further include adjustable strap portions and a rear closure structure. The band-region interface portion of the modular attachment system may be substantially the same as described for the bralette hero embodiment, with minor proportional, structural, or contouring adjustments to accommodate the underwire bra silhouette while maintaining compatibility with an interchangeable member.

[0247] Sports Bra. In another example, the upper base undergarment 19 is configured as a sports bra silhouette, as shown in FIGS. 36A-B. The sports bra embodiment provides a different upper-body garment configuration from the bralette hero embodiment, including chest-covering portions extending across a greater area of the upper torso, strap portions having increased width, and side and rear regions configured to provide increased support and positional retention during wear. In an example, the sports bra embodiment may further include one or more lining layers, support layers, compression fabrics, reinforced panel regions, and / or elasticized edge constructions. The band-region interface portion of the modular attachment system may be substantially the same as described for the bralette hero embodiment, with minor proportional, structural, or contouring adjustments to accommodate the sports bra silhouette while maintaining compatibility with an interchangeable member.

[0248] Bandeau. In another example, the upper base undergarment 19 is configured as a bandeau silhouette, as shown in FIGS. 37A-B. The bandeau embodiment provides a different upper-body garment configuration from the bralette hero embodiment, including chest-covering portions extending across the front of the wearer without strap portions. In an example, the bandeau embodiment may further include one or more support elements, lining layers, molded structures, and / or internal reinforcement features. The band-region interface portion of the modular attachment system may be substantially the same as described for the bralette hero embodiment, with minor proportional, structural, or contouring adjustments to accommodate the bandeau silhouette while maintaining compatibility with an interchangeable member.

[0249] Interchangeable Waistband Member Variants. Each interchangeable waistband member 1 variant defines an insert portion 14 along a lower region configured to be received within the insert-receiving channel 12 and may include a high-friction region 15 on one or both flat sides of the insert portion 14, or may omit the high-friction region 15.

[0250] Each variant may include one or more corresponding latching elements 10 and / or one or more entry points 16 arranged according to an Example A latching configuration, an Example B latching configuration, or both, as described herein.

[0251] Jean. In another example, the interchangeable waistband member 1 is configured as a jean waistband, as shown in FIGS. 22A-B. The jean waistband variant includes a waistband body portion 13 shaped to present a jean-style upper geometry relative to the sweatpant hero embodiment. In an example, this variant may include a zipper structure, button structure, pocket structure, belt-loop structure, or combinations thereof positioned along the waistband body portion 13.

[0252] Trouser. In another example, the interchangeable waistband member 1 is configured as a trouser waistband, as shown in FIGS. 23A-B. The trouser waistband variant includes a waistband body portion 13 shaped to present a trouser-style upper geometry relative to the sweatpant hero embodiment. In an example, this variant may include a zipper structure, pocket structure, pleat-simulating structure, or other tailored waistband detail.

[0253] Basketball Short. In another example, the interchangeable waistband member 1 is configured as a basketball-short waistband, as shown in FIGS. 24A-B. The basketball-short waistband variant includes a waistband body portion 13 shaped to present a basketball-short-style upper geometry relative to the sweatpant hero embodiment.

[0254] Traditional Boxer. In another example, the interchangeable waistband member 1 is configured as a traditional woven boxer waistband, as shown in FIGS. 25A-B. The traditional boxer waistband variant includes a waistband body portion 13 shaped to present a traditional boxer-style upper geometry relative to the sweatpant hero embodiment.

[0255] Bloomer. In another example, the interchangeable waistband member 1 is configured as a bloomer waistband, as shown in FIGS. 26A-B. The bloomer waistband variant includes a waistband body portion 13 shaped to present a bloomer-style upper geometry relative to the sweatpant hero embodiment.

[0256] Interchangeable Fold Over Member Variants. Each interchangeable fold over member 22 variant defines an insert portion 14 along an upper region configured to be received within the insert-receiving channel 12 and may include a high-friction region 15 on one or both flat sides of the insert portion 14, or may omit the high-friction region 15.

[0257] Each variant may include one or more corresponding latching elements 10 and / or one or more entry points 16 arranged according to an Example A latching configuration, an Example B latching configuration, or both, as described herein.

[0258] Midi Skirt. In another example, the interchangeable fold over member 22 is configured as a midi skirt fold over member, as shown in FIGS. 28A-D. The midi skirt fold over variant includes a fold over body portion 23 shaped to present a skirt-style geometry. In use, the fold over body portion 23 is positioned externally relative to a lower body garment such that the fold over body portion 23 overlies an upper portion of the lower body garment. In the midi skirt fold over variant, the fold over body portion 23 extends downward to end at or near a knee region of the wearer.

[0259] Maxi Skirt. In another example, the interchangeable fold over member 22 is configured as a maxi skirt fold over member, as shown in FIGS. 29A-D. The maxi skirt fold over variant includes a fold over body portion 23 shaped to present a skirt-style geometry. In use, the fold over body portion 23 is positioned externally relative to a lower body garment such that the fold over body portion 23 overlies an upper portion of the lower body garment. In the maxi skirt fold over variant, the fold over body portion 23 extends downward to end at or near an ankle region of the wearer.

[0260] Interchangeable Underlay Member Variants. Each interchangeable underlay member 24 variant defines an insert portion 14 along an upper region configured to be received within the insert-receiving channel 12 and may include a high-friction region 15 on one or both flat sides of the insert portion 14, or may omit the high-friction region 15.

[0261] Each variant may include one or more corresponding latching elements 10 and / or one or more entry points 16 arranged according to an Example A latching configuration, an Example B latching configuration, or both, as described herein.

[0262] Short-Length Tank. In another example, the interchangeable underlay member 24 is configured as a short-length underlay in a tank-top-style silhouette, as shown in FIGS. 39A-B. The short-length tank underlay variant includes an underlay body portion 25 shaped to present a tank-top-style geometry. In use, an upper base undergarment 19 is worn beneath an upper body garment, and a portion of the underlay body portion 25 is positioned externally of a lower portion of the upper body garment such that the underlay body portion 25 extends downward beyond the upper body garment. In the short-length tank underlay variant, the underlay body portion 25 extends downward to end at or near a waist region of the wearer.

[0263] Long-Length Lace. In another example, the interchangeable underlay member 24 is configured as a long-length underlay in a lace-style silhouette, as shown in FIGS. 40A-B. The long-length lace underlay variant includes an underlay body portion 25 shaped to present a lace-style geometry. In use, an upper base undergarment 19 is worn beneath an upper body garment, and a portion of the underlay body portion 25 is positioned externally of a lower portion of the upper body garment such that the underlay body portion 25 extends downward beyond the upper body garment. In the long-length lace underlay variant, the underlay body portion 25 extends downward to end at or near a lower leg region of the wearer.

[0264] Interchangeable Tuck Away Member Variants. Each interchangeable tuck away member 26 variant defines an insert portion 14 along a lower region configured to be received within the insert-receiving channel 12 and may include a high-friction region 15 on one or both flat sides of the insert portion 14, or may omit the high-friction region 15.

[0265] Each variant may include one or more corresponding latching elements 10 and / or one or more entry points 16 arranged according to an Example A latching configuration, an Example B latching configuration, or both, as described herein.

[0266] Tank Top. In another example, the interchangeable tuck away member 26 is configured as a tank-top-style tuck away member, as shown in FIGS. 44A-B. The tank-top-style tuck away variant includes a tuck away body portion 27 shaped to present a tank-top-style geometry. In use, the tuck away body portion 27 extends upward from the waist region 3 of a lower base undergarment 2 and is retained relative thereto so as to provide the appearance and / or function of a tucked tank top during wear.

[0267] T-Shirt. In another example, the interchangeable tuck away member 26 is configured as a t-shirt-style tuck away member, as shown in FIGS. 45A-B. The t-shirt-style tuck away variant includes a tuck away body portion 27 shaped to present a t-shirt-style geometry. In use, the tuck away body portion 27 extends upward from the waist region 3 of a lower base undergarment 2 and is retained relative thereto so as to provide the appearance and / or function of a tucked t-shirt during wear.

[0268] Long Sleeve Shirt. In another example, the interchangeable tuck away member 26 is configured as a long-sleeve-shirt-style tuck away member, as shown in FIGS. 46A-B. The long-sleeve-shirt-style tuck away variant includes a tuck away body portion 27 shaped to present a long-sleeve-shirt-style geometry. In use, the tuck away body portion 27 extends upward from the waist region 3 of a lower base undergarment 2 and is retained relative thereto so as to provide the appearance and / or function of a tucked long-sleeve shirt during wear.

[0269] It is noted that the examples shown and described are provided for purposes of illustration and are not intended to be limiting. Still other examples are also contemplated.

Examples

example b

[0208] In embodiments implementing this example latching configuration, releasable coupling occurs while the insert portion 14 remains seated within the insert-receiving channel 12 (FIGS. 16A-I). In such embodiments, the insert portion 14 includes one or more entry points 16 aligned at the engagement region 8 with one or more latching elements 9 associated with the base undergarment. As the outer flap 7 is moved toward the closed configuration, one or more corresponding latching elements 10 associated with the outer flap 7 engage the one or more latching elements 9 through the one or more entry points 16, thereby releasably coupling the interchangeable member to the base undergarment.

[0209]The one or more latching elements 9 may be positioned at any suitable locations along the relevant interface region, including front-center, back-center, side locations, or other spaced locations. In an example, the one or more latching elements 9 are disposed on the inner flap 6 and the one or mo...

Claims

1. A modular layering garment system comprising:a base undergarment having an interface region and a modular attachment system positioned at the interface region, the modular attachment system comprising:an inner flap positioned on a body-facing side of the base undergarment and secured along at least one attachment line;an outer flap positioned opposite the inner flap and secured along a hinge zone, wherein the inner flap and the outer flap comprise channel-forming flaps that define an insert-receiving channel therebetween;wherein the outer flap is movable about the hinge zone between an open configuration exposing an opening region of the insert-receiving channel, and a closed configuration wherein the outer flap overlies the inner flap to cover and at least partially enclose the insert-receiving channel; andat least one latching element disposed at an engagement region of the modular attachment system;an interchangeable member separable from the base undergarment and configured for releasable coupling thereto, the interchangeable member comprising:a visible body portion configured to extend from the modular attachment system during use;an insert portion configured to be removably received within the insert-receiving channel through the opening region when the outer flap is in the open configuration, the insert portion comprising opposing first and second flat sides configured to contact opposing surfaces of the inner flap and the outer flap when seated within the insert-receiving channel; andwherein the insert portion further comprises at least one engagement feature configured to cooperate with the at least one latching element to releasably couple the interchangeable member to the base undergarment;wherein in an assembled condition, the insert portion is seated within the insert-receiving channel, the outer flap is repositioned to the closed configuration such that the outer flap restricts access to the opening region, and the interchangeable member is releasably retained relative to the base undergarment by structural capture of the insert portion between the channel-forming flaps and latching engagement at the engagement region; andwherein the at least one engagement feature of the insert portion comprises either:(i) at least one corresponding latching element disposed on the insert portion and configured for direct mating engagement with the at least one latching element of the base undergarment; or(ii) at least one entry point extending through the insert portion and configured to align with the at least one latching element to permit releasable engagement through the insert portion while the insert portion remains seated within the insert-receiving channel.

2. The modular layering garment system of claim 1, wherein the base undergarment is a lower base undergarment configured for wear on a lower torso region of a wearer, and wherein the interface region comprises a waist region of the lower base undergarment.

3. The modular layering garment system of claim 2, wherein the lower base undergarment is configured as a silhouette selected from the group consisting of a boyshort, a thong, a cheeky, a brief, a trunk, and a boxer brief.

4. The modular layering garment system of claim 1, wherein the base undergarment is an upper base undergarment configured for wear on an upper torso region of a wearer, and wherein the interface region comprises a band region of the upper base undergarment.

5. The modular layering garment system of claim 4, wherein the upper base undergarment is configured as a silhouette selected from the group consisting of a bralette, an underwire bra, a sports bra, and a bandeau.

6. The modular layering garment system of claim 1, wherein the interchangeable member is an interchangeable waistband member, wherein the insert portion is positioned along a lower region of the interchangeable waistband member, and wherein the visible body portion comprises a waistband body portion extending circumferentially around a wearer and positioned externally relative to the base undergarment during use.

7. The modular layering garment system of claim 6, wherein the waistband body portion is configured as a silhouette selected from the group consisting of a sweatpant waistband, a jean waistband, a trouser waistband, a basketball short waistband, a traditional woven boxer waistband, and a bloomer waistband.

8. The modular layering garment system of claim 1, wherein the interchangeable member is an interchangeable fold over member, wherein the insert portion is positioned along an upper region of the interchangeable fold over member, and wherein the visible body portion comprises a fold over body portion configured to overlie at least an upper portion of a lower body garment to provide a fold over layered effect.

9. The modular layering garment system of claim 8, wherein the fold over body portion is configured as a silhouette selected from the group consisting of a mini skirt fold over, a midi skirt fold over, and a maxi skirt fold over.

10. The modular layering garment system of claim 1, wherein the interchangeable member is an interchangeable underlay member, wherein the insert portion is positioned along an upper region of the interchangeable underlay member, and wherein the visible body portion comprises an underlay body portion configured to extend downward beneath an upper body garment to provide a layered visual effect during use.

11. The modular layering garment system of claim 10, wherein the underlay body portion is configured as a silhouette selected from the group consisting of a medium-length button-down underlay, a short-length tank-top-style underlay, and a long-length lace-style underlay.

12. The modular layering garment system of claim 1, wherein the interchangeable member is an interchangeable tuck away member, wherein the insert portion is positioned along a lower region of the interchangeable tuck away member, and wherein the visible body portion comprises a tuck away body portion extending upward along at least a portion of a torso of a wearer such that at least a lower portion of the tuck away body portion is retained in a tucked configuration relative to the base undergarment during use.

13. The modular layering garment system of claim 12, wherein the tuck away body portion is configured as a silhouette selected from the group consisting of a button-down shirt, a tank top, a t-shirt, and a long-sleeve shirt.

14. The modular layering garment system of claim 1, wherein the at least one engagement feature of the insert portion comprises the at least one corresponding latching element, and wherein releasable coupling is achieved through direct mating engagement between the at least one latching element of the base undergarment and the at least one corresponding latching element of the insert portion when the insert portion is received within the insert-receiving channel.

15. The modular layering garment system of claim 14, wherein the at least one latching element and the at least one corresponding latching element comprise releasable coupling structures selected from the group consisting of buttons, snaps, hook-and-loop structures, hook-and-eye structures, clasps, interlocking fasteners, g-hooks, push snap buckles, and magnets.

16. The modular layering garment system of claim 1, wherein the at least one engagement feature of the insert portion comprises the at least one entry point, and wherein the outer flap further comprises at least one corresponding latching element configured to engage the at least one latching element of the base undergarment through the at least one entry point when the outer flap is moved toward the closed configuration while the insert portion remains seated within the insert-receiving channel.

17. The modular layering garment system of claim 16, wherein the at least one entry point comprises an access feature selected from the group consisting of openings, slits, cut-outs, apertures, notches, reinforced holes, and buttonhole-type openings.

18. The modular layering garment system of claim 1, wherein the modular attachment system further comprises a high-friction region disposed on at least one of the opposing first and second flat sides of the insert portion, a channel-facing side of the inner flap, and a channel-facing side of the outer flap, and wherein the high-friction region is configured to increase frictional engagement to resist relative sliding or withdrawal of the insert portion during wear.

19. The modular layering garment system of claim 18, wherein the high-friction region comprises a feature selected from the group consisting of printed elastomer features, silicone features, a textured coating, a friction-enhancing film, a grippy tape, and a high-friction textile structure.

20. The modular layering garment system of claim 1, wherein the at least one latching element of the base undergarment comprises a plurality of latching elements positioned at spaced circumferential locations comprising a front-center region, a back-center region, and one or more side regions around the interface region.

Images