Warm-keeping garment convenient to ventilate

By using overlapping warm cloth strips and breathable fabric combinations in warm clothing, and using high-quality insulation materials and mesh design, the effect of automatically adjusting breathability and warmth under different environments and activity intensity is solved, which solves the problem that traditional warm clothing cannot adapt to different conditions.

CN222853232UActive Publication Date: 2025-05-13HUNAN WANGBULIAO GARMENTS +1
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Patent Information

Application Number
CN202421757412.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-24
Publication Date
2025-05-13
Estimated Expiration
2034-07-24

AI Technical Summary

Technical Problem

Traditional warm clothing cannot automatically adjust its breathability and warmth under different environments and activity intensity, resulting in the wearer being unable to keep warm effectively when cold and easily stuffy and uncomfortable when moving.

Method used

The warm cloth strips and breathable fabrics are used to overlap the heating layer of down or cashmere materials and a symmetrically folded protective layer. The breathable cloth is a mesh, which is connected by Velcro to achieve the detachable and adjustable functions of the warm cloth strips.

Benefits of technology

In a stationary or low temperature environment, the warm cloth strips are closely fitted to form an effective warm-keeping layer; in an active or high temperature environment, the gap between the warm cloth strips becomes larger, promoting air circulation, improving breathability and heat dissipation efficiency, and realizing the functions of automatically adjusting warm-keeping and breathability.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a warm-keeping garment convenient to ventilate, which comprises a garment body and a ventilation module arranged on the back of the garment body. The breathable module comprises breathable cloth and warm-keeping cloth strips, the breathable cloth is arranged on the inner side of the back face of the garment body, the warm-keeping cloth strips are sequentially arranged on the breathable cloth at intervals, one end of each warm-keeping cloth strip is connected to the breathable cloth, and the other end of each warm-keeping cloth strip naturally droops and is in lap joint with the corresponding warm-keeping cloth strip on the lower portion. According to the warm-keeping breathable garment, the warm-keeping cloth strips and the breathable cloth which are arranged in an overlapped mode are adopted, so that the back of the garment can be rapidly breathable, the function of automatically adjusting warm keeping and breathability under different environments and activity intensities is achieved, and more comfortable, healthy and personalized wearing experience is provided for a wearer.
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Description

Technical Field

[0001] The utility model relates to the field of thermal insulation clothing, in particular to a thermal insulation clothing which is easy to breathe. Background Art

[0002] Traditional clothing is one-piece and designed according to the season. In areas with large temperature differences between day and night, such clothing cannot be used for two purposes and is prone to being too hot or cold. Ordinary clothing products such as down jackets and cotton jackets are mostly sewn by manually operated sewing machines. Through the sewing stitches, a thermal insulation layer separated from the outside world can be formed. There is a certain amount of air in the gaps between the thermal insulation layers. Since the gaps are very small, the air convection between them is poor, making it difficult for the cold air outside to reach the inside. On the contrary, it is also difficult for the hot air inside to reach the outside, resulting in traditional thermal clothing being stuffy and not breathable.

[0003] Prior art CN201510133411.2 discloses a breathable down jacket, comprising a long-sleeved body, a mesh and a movable piece. The breathable down jacket is provided with a mesh from the armpit to the hem, and the outer layer of the mesh is provided with a movable piece, and the movable piece and the mesh are sewn on the long-sleeved body. Although the down jacket of this invention is ventilated and breathable, it still has the following problems:

[0004] 1. Movable panels on the outside of clothing may affect the appearance and comfort of the clothing, especially if they do not fit the body well or cause unnecessary friction during exercise, which can easily cause damage and affect the warmth retention effect.

[0005] 2. The ventilation area of ​​this solution is only set from the armpit to the hem, while the existing thermal clothing mainly needs ventilation at the back. The zipper or buttons can be opened at the front for ventilation, but the back needs to take off the thermal clothing for ventilation and heat dissipation, which is easy to cause sudden cold and lead to cold. Utility Model Content

[0006] In view of this, the purpose of the utility model is to provide a thermal clothing that is easy to breathe. By adopting overlapping thermal cloth strips and breathable fabrics to make the back of the clothing breathe quickly, it realizes the function of automatically adjusting warmth and ventilation under different environments and activity intensities, providing the wearer with a more comfortable, healthy and personalized wearing experience.

[0007] The technical solution adopted by the utility model to solve its technical problems is:

[0008] Provided is a breathable warm clothing, comprising: a clothing body and a breathable module, wherein the breathable module is arranged on the back of the clothing body;

[0009] The ventilation module includes breathable fabric and warming fabric strips. The breathable fabric is arranged on the inner side of the back of the clothing body. The warming fabric strips are arranged on the breathable fabric at intervals in sequence. One end of the warming fabric strip is connected to the breathable fabric, and the other end hangs down naturally and overlaps the warming fabric strip below.

[0010] It should be noted that the combination of thermal insulation strips and breathable fabrics allows the wearer to remain comfortable in different environments and activity intensities. When the wearer is stationary or lightly active, the thermal insulation strips fit tightly to form a continuous thermal insulation layer, effectively isolating the cold air from the outside while maintaining internal warmth. However, in the case of intense activity or elevated body temperature, the tiny gaps between the thermal insulation strips can expand into relatively large gaps due to body movement or clothing lifting, thereby allowing air to circulate, helping sweat and moisture to be quickly discharged, and preventing the wearer from feeling stuffy.

[0011] Preferably, the warm fabric strip comprises a heat-insulating layer and a protective layer, the protective layer is symmetrically folded and the edges are sewn to form a receiving cavity for the heat-insulating layer, the heat-insulating layer is arranged in the receiving cavity, and the sewn edges of the protective layer are connected to the breathable fabric.

[0012] It should be noted that the protective layer is formed by symmetrical folding and sewing, so that the thermal insulation layer is wrapped in a containing cavity formed by folding and sewing the protective layer, ensuring that the thermal insulation material will not be directly exposed to the external environment, thereby improving product quality. At the same time, one end of the fabric edge of the protective layer can be attached to the breathable fabric, while the folded end can be in contact with the human body, thereby improving wearing comfort.

[0013] Preferably, the thermal insulation layer is made of processed down or cashmere material.

[0014] It should be noted that down and cashmere are two excellent natural thermal insulation materials. They have excellent thermal insulation performance and are light. Using processed down or cashmere as the insulation layer can ensure that the thermal insulation strips remain light, comfortable and durable while providing efficient warmth.

[0015] Preferably, the breathable fabric is a mesh fabric, and the mesh fabric is sewn onto the outer fabric of the garment body.

[0016] It should be noted that mesh, as a material with excellent breathability, can effectively promote air circulation, help sweat and moisture to be quickly discharged, and avoid discomfort caused by sweat accumulation during activities. Sewing the mesh to the outer fabric of the garment body can not only ensure the stability and durability of the breathable module, but also make the air flow between the thermal strips and the breathable fabric smoother, further enhancing the breathability of the garment.

[0017] Preferably, the warming cloth strip is detachably connected to the breathable cloth via Velcro, the suede surface of the Velcro is arranged on the breathable cloth in a square shape at intervals, and the hook surfaces of the Velcro are correspondingly arranged on the upper end and both sides of the warming cloth strip.

[0018] It should be noted that by using Velcro as the connection method between the warming strips and the breathable fabric, the detachable and adjustable functions of the warming strips are realized, and in the case that the clothes are difficult to dry in winter, the warming strips and the clothes body are disassembled and air-dried to achieve the quick drying of the warm clothing; and the velvet surface of the Velcro is arranged on the breathable fabric in a square interval, which not only ensures the firm connection between the warming strips and the breathable fabric, but also allows the warming strips to move freely and adjust their positions within a certain range, and is also convenient for disassembly and repositioning; because the warming strips are connected to the breathable fabric through Velcro, the wearer can flexibly adjust the coverage and density of the warming strips according to personal needs and environmental changes. For example, when exercising or the temperature is high, the distance between the warming strips can be appropriately pulled apart (reducing the number of warming strips) to increase air permeability and heat dissipation efficiency; in a cold or static state, the distance between the warming strips can be reduced to improve the warming effect, increase the contact area of ​​the warming strips of the overlapping parts, reduce the efficiency of opening and closing the warming strips, and improve the comfort of wearing clothing.

[0019] Preferably, the spacing distance between adjacent warming cloth strips is smaller than the width of the warming cloth strips.

[0020] It should be noted that the spacing between adjacent thermal strips is designed to be smaller than the width of the thermal strips themselves, so that the thermal strips can be overlapped like fish scales. By carefully calculating the width and spacing of the thermal strips, it is ensured that in different environments and activity intensities, the thermal clothing can not only effectively keep warm, but also expel moisture from the body in time, avoiding excessive stuffiness or hypothermia, and achieving an ideal balance between warmth and breathability.

[0021] Preferably, the ventilation module further comprises a protective fabric, and the protective fabric is arranged on the outside of the clothing body corresponding to the breathable fabric and can cover the breathable fabric.

[0022] It should be noted that the provision of protective fabrics is to further enhance the performance of thermal clothing under extreme weather conditions, especially in windy environments, the protective fabrics can effectively block the intrusion of external cold wind and prevent the gaps between the thermal fabric strips from becoming channels for cold wind, thereby better maintaining the warmth inside the clothing; the protective fabrics can be designed to be detachable and connected to the main body of the clothing by buttons, zippers or Velcro, so that you can flexibly choose whether to use the protective fabrics according to different weather conditions and personal needs, thereby increasing the versatility and adaptability of the clothing.

[0023] Preferably, the upper end and both sides of the protective fabric are integrally formed with the garment body, and the lower end is overlapped on the garment body to form an opening between the lower end and the garment body.

[0024] It should be noted that the one-piece molded part of the protective fabric ensures a close connection between the protective fabric and the garment body, improves the stability of the entire garment structure, avoids the risk of displacement or falling off of the protective fabric in strong winds or other harsh conditions, enhances the integrity and durability of the garment, and the openings are conducive to the discharge of sweat and moisture.

[0025] Beneficial effects of the utility model:

[0026] The utility model provides a breathable thermal clothing, which adopts a combination of overlapping thermal strips and breathable fabrics, so that the thermal strips can fit closely to form an effective thermal insulation layer in a static or low-temperature environment; while in an active or high-temperature environment, the gaps between the thermal strips become larger, which promotes air circulation and improves breathability, thereby realizing automatic adjustment of breathability and thermal insulation of the thermal clothing under different activity intensities and environmental conditions; the thermal strips are made of high-quality thermal insulation materials (such as down or cashmere) and a protective layer design formed by symmetrical folding and sewing, which not only provides excellent thermal insulation effect, but also enhances the wearing comfort and durability of the product; the use of Velcro makes the connection of the thermal strips detachable and adjustable, and the wearer can flexibly adjust the coverage and density of the thermal strips according to personal preferences and actual needs to meet the changes of different occasions and seasons. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the three-dimensional structure of a breathable warm clothing according to Example 1 of the utility model.

[0028] Figure 2 This is a schematic diagram of the unfolded structure of a warm fabric strip of a breathable warm clothing according to Example 1 of the utility model.

[0029] Figure 3 This is a schematic structural diagram of the garment body and breathable fabric of Example 1 of the utility model.

[0030] Figure 4 This is a schematic structural diagram of the warming cloth strip of Example 1 of the utility model.

[0031] Figure 5 This is a physical state diagram of Example 1 of the utility model.

[0032] Figure 6 This is a three-dimensional schematic diagram of a breathable warm clothing according to Example 2 of the utility model.

[0033] Figure 7This is a schematic diagram of the installation structure of the garment body and the Velcro in Example 2 of the utility model.

[0034] Figure 8 This is a schematic diagram of the connection structure between the clothing body and the protective fabric in Example 3 of the utility model.

[0035] Fig. 9 This is a cross-sectional view of the connection structure between the garment body and the protective fabric in Example 3 of the present utility model.

[0036] In the figure: 1. Clothes body; 2. Breathable module; 21. Warm fabric strip; 211. Insulation layer; 212. Protective layer; 22. Breathable fabric; 3. Velcro; 4. Protective fabric.

[0037] It should be noted that these drawings and text descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] Example 1

[0040] like Figure 1-Figure 5 As shown, a warm-keeping garment that is easy to ventilate comprises: a garment body 1 and a ventilating module 2, wherein the ventilating module 2 is arranged on the back of the garment body 1;

[0041] The ventilation module 2 includes a breathable fabric 22 and a warming fabric strip 21. The breathable fabric 22 is arranged on the inner side of the back of the clothing body 1. The warming fabric strips 21 are arranged on the breathable fabric 22 at intervals in sequence, and one end of the warming fabric strip 21 is connected to the breathable fabric 22, and the other end naturally droops and overlaps the warming fabric strip 21 below.

[0042] The warm fabric strip 21 includes a heat preservation layer 211 and a protective layer 212 . The protective layer 212 is symmetrically folded and the edges are sewn to form a receiving cavity for the heat preservation layer 211 . The heat preservation layer 211 is arranged in the receiving cavity, and the sewn edges of the protective layer 212 are connected to the breathable fabric 22 .

[0043] The thermal insulation layer 211 is made of processed down material.

[0044] The breathable fabric 22 is a mesh fabric, which is sewn onto the outer fabric of the garment body 1 .

[0045] The spacing between adjacent warming cloth strips 21 is smaller than the width of the warming cloth strips 21 .

[0046] The working principle and use method of a breathable warm clothing of this embodiment:

[0047] The present embodiment provides a thermal clothing that is easy to breathe. When the user is stationary or slightly active, the thermal strip 21 fits tightly against the breathable fabric 22 to form a continuous thermal insulation layer, which effectively isolates the cold air from the outside while maintaining internal warmth. The thermal strip 21 is fixedly connected to the breathable fabric 22 at one end to ensure the stability of the thermal insulation layer, while the other end naturally droops and overlaps the thermal strip 21 below to form layers of thermal insulation barriers. During intense activities or when the body temperature rises, the tiny gaps between the thermal strips 21 are displaced due to body movement or clothing lifting to form larger gaps, thereby achieving ventilation and perspiration functions. This dynamic change allows the clothing to To adapt to the wearer's activity intensity and body temperature changes, ensure that sweat and moisture can be discharged in time to avoid stuffiness and discomfort, the thermal insulation layer 211 inside the thermal insulation strip 21 is made of treated down or cashmere material, which has excellent thermal insulation performance and lightness, and the external protective layer 212 is formed by symmetrical folding and sewing, which not only protects the thermal insulation layer 211 from damage by the external environment, but also improves the wearing comfort. The breathable fabric 22 (such as mesh) is sewn on the inner side of the back of the clothing body 1, which can effectively promote air circulation, help sweat and moisture to be quickly discharged, and avoid the discomfort caused by sweat accumulation; at the same time, the use of mesh also ensures the stability and durability of the breathable module 2.

[0048] When in use, the user wears the thermal clothing on a narrow body, with the breathable fabric 22 located on the inner side of the back, and the thermal strips 21 drooping naturally to form an initial thermal insulation layer. When it is necessary to increase breathability, the wearer can slightly pull the back fabric to cause a slight displacement between the thermal strips 21 to form gaps, thereby achieving ventilation and perspiration functions. Conversely, when it is necessary to enhance warmth retention, the zipper of the thermal clothing can be zipped up, and the overlaps between the thermal strips 21 will be tighter, reducing air circulation and enhancing the warmth retention effect.

[0049] Embodiment 2

[0050] like Figure 6 and Figure 7 As shown, a breathable warm clothing of this embodiment includes:

[0051] A garment body 1 and a ventilation module 2, wherein the ventilation module 2 is arranged on the back of the garment body 1;

[0052] The ventilation module 2 includes a breathable fabric 22 and a warming fabric strip 21. The breathable fabric 22 is arranged on the inner side of the back of the clothing body 1. The warming fabric strips 21 are arranged on the breathable fabric 22 at intervals in sequence, and one end of the warming fabric strip 21 is connected to the breathable fabric 22, and the other end naturally droops and overlaps the warming fabric strip 21 below.

[0053] The warm fabric strip 21 includes a heat preservation layer 211 and a protective layer 212 . The protective layer 212 is symmetrically folded and the edges are sewn to form a receiving cavity for the heat preservation layer 211 . The heat preservation layer 211 is arranged in the receiving cavity, and the sewn edges of the protective layer 212 are connected to the breathable fabric 22 .

[0054] The thermal insulation layer 211 is made of processed cashmere material.

[0055] The breathable fabric 22 is a mesh fabric, which is sewn onto the outer fabric of the garment body 1 .

[0056] The warming cloth strip 21 is detachably connected to the breathable cloth 22 via the Velcro 3. The suede surface of the Velcro 3 is arranged on the breathable cloth 22 in a square shape at intervals. The hook surface of the Velcro 3 is correspondingly arranged on the upper end and both sides of the warming cloth strip 21.

[0057] The spacing between adjacent warming cloth strips 21 is smaller than the width of the warming cloth strips 21 .

[0058] Compared with Example 1:

[0059] The present embodiment provides a breathable thermal clothing, in which a thermal cloth strip 21 is detachably connected to a breathable fabric 22 through Velcro 3; the velvet surface of the Velcro 3 is arranged on the breathable fabric 22 in a square shape as a whole, and the hook surfaces of the Velcro 3 are correspondingly arranged on the upper end and both sides of the thermal cloth strip 21, so that the thermal cloth strip 21 can be flexibly adjusted in position according to the wearer's needs and environmental changes, and the wearer can easily adjust the coverage and density of the thermal cloth strip 21 according to personal needs to meet the demand for warm temperature. At the same time, when cleaning is needed, the thermal cloth strip 21 can be quickly removed, washed separately, and then reinstalled to keep the clothing clean and hygienic. This detachable and adjustable design makes the thermal clothing not only suitable for cold weather, but also suitable for wearing during season change or in an environment with a large temperature difference between indoor and outdoor, and the wearer can adjust the configuration of the thermal cloth strip 21 at any time according to real-time temperature changes and personal comfort needs.

[0060] Embodiment 3

[0061] like Figure 8 and Fig. 9As shown, a thermal insulation garment that is easy to breathe in this embodiment includes: a garment body 1 and a breathable module 2, wherein the breathable module 2 is arranged on the back of the garment body 1; the breathable module 2 includes a breathable fabric 22 and a thermal insulation strip 21, wherein the breathable fabric 22 is arranged on the inner side of the back side of the garment body 1, and the thermal insulation strips 21 are arranged on the breathable fabric 22 in sequence at intervals, and one end of the thermal insulation strip 21 is connected to the breathable fabric 22, and the other end droops naturally and overlaps the thermal insulation strip 21 below.

[0062] The warm fabric strip 21 includes a heat preservation layer 211 and a protective layer 212 . The protective layer 212 is symmetrically folded and the edges are sewn to form a receiving cavity for the heat preservation layer 211 . The heat preservation layer 211 is arranged in the receiving cavity, and the sewn edges of the protective layer 212 are connected to the breathable fabric 22 .

[0063] The thermal insulation layer 211 is made of processed down material.

[0064] The breathable fabric 22 is a mesh fabric, which is sewn onto the outer fabric of the garment body 1 .

[0065] The warming cloth strip 21 is detachably connected to the breathable cloth 22 via the Velcro 3. The suede surface of the Velcro 3 is arranged on the breathable cloth 22 in a square shape at intervals. The hook surface of the Velcro 3 is correspondingly arranged on the upper end and both sides of the warming cloth strip 21.

[0066] The spacing between adjacent warming cloth strips 21 is smaller than the width of the warming cloth strips 21 .

[0067] The ventilation module 2 further includes a protective fabric 4 , which is arranged on the outside of the clothing body 1 corresponding to the breathable fabric 22 and can cover the breathable fabric 22 .

[0068] The upper end and both sides of the protective fabric 4 are integrally formed with the garment body 1, and the lower end is overlapped on the garment body 1 to form an opening between the protective fabric 4 and the garment body 1.

[0069] Compared with Example 1:

[0070] The present embodiment provides a breathable thermal garment, which can effectively block the invasion of external cold wind by adding a protective fabric 4 on the outside of the breathable fabric 22, and prevent the gaps between the thermal fabric strips 21 from becoming a channel for cold wind, thereby better maintaining the warmth inside the garment. The one-piece molded part ensures a tight connection between the protective fabric 4 and the garment body 1, improves the stability of the entire garment structure, avoids the risk of displacement or shedding of the protective fabric 4 under strong winds or other adverse conditions, and enhances the integrity and durability of the garment; and the opening is conducive to the discharge of sweat and moisture, ensuring that the wearer can still stay dry and comfortable under high activity intensity or high temperature environment.

[0071] Finally, it should be noted that the above is only a preferred embodiment of the utility model, which is only used to illustrate the technical solution of the utility model, and is not used to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model are included in the protection scope of the utility model.

[0072] In the description of the present invention, it needs to be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "upper end", "lower end", "upper surface", "lower surface", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0073] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connection" and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

Claims

1. A breathable warm clothing, comprising: A garment body (1) and a ventilation module (2), wherein the ventilation module (2) is arranged on the back of the garment body (1); the characteristics are: The ventilation module (2) comprises a breathable fabric (22) and a warming fabric strip (21), wherein the breathable fabric (22) is arranged on the inner side of the back of the garment body (1), and the warming fabric strips (21) are arranged on the breathable fabric (22) at intervals in sequence, and one end of the warming fabric strip (21) is connected to the breathable fabric (22), and the other end is naturally drooped and overlapped on the warming fabric strip (21) below.

2. The breathable warm clothing according to claim 1, characterized in that: The warming cloth strip (21) comprises a heat-insulating layer (211) and a protective layer (212); the protective layer (212) is symmetrically folded and its edges are sewn to form a receiving cavity for the heat-insulating layer (211); the heat-insulating layer (211) is arranged in the receiving cavity, and the sewn edges of the protective layer (212) are connected to the breathable cloth (22).

3. The breathable warm clothing according to claim 2, characterized in that: The thermal insulation layer (211) is made of processed down or cashmere material.

4. The breathable warm clothing according to claim 2, characterized in that: The breathable fabric (22) is a mesh fabric, which is sewn onto the outer fabric of the garment body (1).

5. The breathable warm clothing according to claim 1, characterized in that: The warming cloth strip (21) is detachably connected to the breathable cloth (22) via a Velcro (3); the velvet surface of the Velcro (3) is arranged on the breathable cloth (22) in a square shape at intervals; the hook surface of the Velcro (3) is correspondingly arranged at the upper end and both sides of the warming cloth strip (21).

6. The breathable warm clothing according to claim 1, characterized in that: The spacing distance between adjacent warming cloth strips (21) is smaller than the width of the warming cloth strips (21).

7. The breathable warm clothing according to claim 1, characterized in that: The ventilation module (2) further comprises a protective cloth (4), wherein the protective cloth (4) is arranged on the outside of the clothing body (1) corresponding to the breathable cloth (22) and is capable of covering the breathable cloth (22).

8. The breathable warm clothing according to claim 7, characterized in that: The upper end and both sides of the protective cloth (4) are integrally formed with the garment body (1), and the lower end is overlapped on the garment body (1) and can form an opening between the lower end and the garment body (1).

Citation Information

Patent Citations

  • Breathable down jacket

    CN104705825A