Sandals

Abstract

To provide sandals that promote toe movement and eliminate the deformation of the foot shape just by wearing them. [Solution] A pair of sandals comprising a base and a thong whose front part is band-shaped and has a width in the front-to-back direction of the base, the base being a molded product made of synthetic resin, and comprising a first covering member covering the top surface of the base and a second covering member further covering a partial area of ​​the top surface of the first covering member, the second covering member having a predetermined thickness that forms a step with respect to the surface of the first covering member at its front edge extending across the width of the foot, the front edge having a dogleg shape along a line connecting the depressions between the pads and bases of all the toes on the sole of the foot, the apex of the dogleg shape being located on the little toe side of the position where the front part is inserted into the base, and the edge line on the big toe side extending from the apex rearward of the position where the front part is inserted, and the base having a mountain-shaped convex portion integrally formed over the area where the bases of the second to fourth toes come into contact.

Description

[Technical field]

[0001] This invention relates to sandals that, when worn, can be expected to promote toe movement and eliminate the deformation of the foot shape that can cause poor physical condition. [Background technology]

[0002] In recent years, the health of your feet has been drawing attention as something that affects your physical and mental health. Improper foot shape and posture can cause an imbalance in your center of gravity, which can put stress on the knees, hips, and even the muscles in your back, shoulders, and neck, leading to physical and mental disorders such as joint pain, stiff shoulders, and headaches.

[0003] The main cause of foot deformation is pressure on the toes caused by continuing to wear tight shoes such as high heels or pointed leather shoes. Pressure on the toes leads to deformation of the toes such as valgus of the big toe, inversion of the little toe, and floating toes. These deformations of the toes mean that the toes cannot press firmly on the ground, and the center of gravity is biased toward the heel when walking.

[0004] The body naturally tries to correct this imbalance in the center of gravity, leading to poor posture, such as walking with bent knees and a rounded back. If this poor posture becomes a habit, it can cause stress to the joints and muscles throughout the body, resulting in the aforementioned disorders.

[0005] Therefore, various kinds of footwear that can be used daily have been developed to eliminate the deformation of the foot shape so that all toes can step on the ground and the body can be supported by the entire sole of the foot. The first type of footwear that has been considered is one that allows the space between the toes to be spread apart. In particular, sandals-type footwear are considered to be preferable for preventing hallux valgus.

[0006] The general structure of zori is that the top surface of a base with a foot-shaped outline is covered with a decorative sheet to form a surface called the "top" where the sole of the foot rests, and a V-shaped strap is inserted into it. The strap consists of a front part that is sandwiched between the big toe and second toe at the front end, and two horizontal straps that extend backwards on both sides from the front part to rest on the instep. Therefore, simply by putting on the zori, the front part that fits between the big toe and second toe functions to separate the two toes. In addition, all the toes can move freely without being pressed from the outside to the inside.

[0007] Some sandals are based on such a strap and are equipped with a mechanism to spread the spaces between the other toes. For example, Patent Document 1 discloses a sandal with a protrusion on the toe-pressing surface that is inserted between the toes to spread the skeleton in a fan shape. Furthermore, a sandal with a lot of protrusions on the base surface is also proposed, which stimulates the pressure points on the sole of the foot to promote blood circulation and health through acupressure effects (see Patent Document 2, for example). [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Utility Model Application Publication No. 02-96902 [Patent Document 2] JP 2000-287701 A Summary of the Invention [Problem to be solved by the invention]

[0009] However, simply spreading the space between the toes or wearing sandals with a pressure point pressing function only improves blood circulation and temporarily gives a sense of freedom between the toes. To make the relief of the condition last, active toe exercises that can fundamentally correct the deformation of the foot shape are necessary. For example, exercises that involve repeatedly and frequently clenching all the toes, then loosening and opening them, are one example.

[0010] SUMMARY OF THE PRESENT EMBODIMENT In view of the above problems, the object of the present invention is to provide a pair of sandals which can improve the shape of the foot by simply wearing them and promote the movement of the toes. [Means for solving the problem]

[0011] In order to achieve the above object, the invention of claim 1 provides a pair of sandals comprising a base, a strap having a front end inserted and fixed into a front mounting hole formed in the front part of the base, and two horizontal straps extending from the front end to the left and right rear ends inserted and fixed into two rear mounting holes formed near the left and right edges of the rear part of the base, the front end being a band-like strap having a width in the front-to-rear direction of the base, the base is a molded product made of synthetic resin, and includes a first covering member that covers an upper surface of the base, and a second covering member that further covers a partial area of ​​the upper surface of the first covering member; the second covering member has a predetermined thickness that forms a step with respect to a surface of the first covering member at a front edge in a lateral width direction of the foot, The front edge has a dogleg shape along a line connecting the depressions between the pads and the bases of all the toes on the sole of the foot, and the apex of the dogleg shape is located on the little toe side of the position where the front part is inserted into the base, and the edge line on the big toe side extends from the apex to the rear of the position where the front part is inserted, The base is provided integrally with a mountain-shaped protrusion over an area where the bases of the second to fourth toes come into contact.

[0012] The sandals according to the invention described in claim 2 are characterized in that, in the sandals described in claim 1, the thickness of the front edge of the second covering member that forms the step is 2 mm to 10 mm.

[0013] The invention of claim 3 relates to the sandals of claim 1, in which the front part has a maximum thickness of 5 to 8 mm.

[0014] The zori according to the invention recited in claim 4 is characterized in that in the zori recited in claim 1, the two horizontal straps of the thong have a wide band-like shape, the width of the horizontal strap on the thumb side is maximized at the base of the thumb, and the maximum width is 1.2 to 3 times larger than the width of the horizontal strap on the little finger side, which is located in the symmetrical position. Effect of the Invention

[0015] In the sandals of this invention, the space between the big toe and the second toe is widened just by wearing them, and when stepping out, the tips of all the toes are caught in the step formed by the thickness of the front edge of the second covering member, so that the toes are naturally grasped and grasped in a fist, so that simply walking encourages the fist movement of the toes, which strengthens the muscles of the toes and eliminates the deformation of the foot shape. Therefore, it is expected that the effect of eliminating various physical and mental disorders caused by the deformation of the foot shape can be expected. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is a schematic diagram of a left-foot zori (a pair of sandals) according to an embodiment of the present invention; (a) is a side view of the big toe side; (b) is a perspective view of (a) tilted slightly; (c) is a perspective view from the toe side; and (d) is a diagram of the zori (c) when worn. [Diagram 2] 2A is an enlarged side view of the toe portion of the sandals in FIG. 1(b), and FIG. 2B is a schematic enlarged cross-sectional view of the toe portion along the line AA in FIG. 1(c), showing only the base. [Diagram 3] FIG. 2 is a schematic diagram of the overall configuration of the sandals in FIG. 1 as viewed from the little toe side, where (a) is a perspective view and (b) is a view of the state when the sandals in (a) are worn and a step is taken. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] The zori according to the present invention comprises a base, a strap with a width in the front-to-rear direction of the base, the front end of which is inserted and fixed into a front mounting hole formed in the front of the base, and two horizontal straps extending from the front end to the left and right rear ends of the base are inserted and fixed into two rear mounting holes formed near the left and right edges of the rear of the base, the front end being a band-like strap having a width in the front-to-rear direction of the base, the base being a molded product made of synthetic resin, a first covering member covering the top surface of the base, and the first covering member and a second covering member which further covers a partial area of ​​the upper surface of the first covering member, the second covering member having a predetermined thickness at its front edge in the lateral direction of the foot that forms a step with respect to the surface of the first covering member, the front edge having an L-shape along a line connecting the depressions between the pads and bases of all the toes on the sole of the foot, the apex of the L-shape being located on the little toe side of the position at which the front part is inserted into the base, and the edge line on the big toe side extending from the apex to the rear of the position at which the front part is inserted.

[0018] With the above-mentioned structure, when the sandals of the present invention are worn, the front part is sandwiched between the big toe and the second toe in the natural state, spreading the space between the two toes. Moreover, since the front part is a strip with a width in the front-back direction, it urges the two toes in the direction of moving away from each other along the length of the toes, and is particularly effective in resisting the valgus of the big toe. Hallux valgus is a condition in which the MTP joint (consisting of the distal metatarsal and the proximal proximal phalange) at the base of the big toe protrudes outward, and the tip of the toe is bent toward the little toe so that it overlaps with the second toe. Therefore, the tip of the big toe continues to receive a urging force in the direction of moving away from the second toe, which helps to eliminate hallux valgus.

[0019] In addition, since the length of the toes of an individual varies depending on the foot size, the effective minimum width of the front part between the big toe and the second toe also varies. On the other hand, since it is common for sandals to be classified by foot size, for example, S, M, L, and LL, the width of the front part may be changed stepwise according to the various sizes, but it is preferable to set it in a range of 10 mm to 20 mm. In addition, by inclining the front part backward with respect to the base surface, the biasing area in the direction in which the big toe and the second toe are separated increases along the inclination of the toe crotch, and the action of spreading the big toe outward is more effectively exerted. The backward inclination angle of this front part with respect to the base surface is preferably in the range of 45 degrees to 65 degrees corresponding to the inclination of the toe crotch. Outside this range, it does not follow the inclination of the toe crotch, and if the inclination is too steep, the insertion of the front part between the toes is hindered, making it difficult to wear, and if it rises too high above the upper limit, the area biasing both toes in the direction in which they are separated from each other becomes small, reducing the effect of the biasing force.

[0020] In addition, the front part needs to have a certain thickness in order to effectively exert a biasing force in the direction of separation between the big toe and the second toe. Preferably, the maximum thickness is in the range of 5 mm to 8 mm. If the thickness is smaller than this lower limit, the space between the two toes is small, making it difficult to generate the biasing force. If the thickness is larger than this upper limit, the toe gaps will be too wide, which may cause pain in some cases and make it difficult to continue wearing the sandals. Even if the front part is relatively thick, by including a cushioning material inside the front part, it is possible to reduce irritation to the toe gaps and make it easier to continue wearing the sandals of this invention.

[0021] Furthermore, in the present invention, the front edge of the second covering member which is further provided on the upper surface of the first covering member which covers the upper surface of the base, has a thickness which forms a step in the shape of an L along the line connecting the depressions between the pads and the bases of all the toes on the sole of the foot. Therefore, when the toes are planted firmly while wearing the sandals, the rear parts of the pads of all the toes, including the big toe, get caught on the step and naturally make a fist movement to grab the edge, and the opening and closing movement is naturally encouraged and repeated as the person wears the sandals and walks.

[0022] In this invention, the apex of the L-shaped front edge that forms the step is located on the little toe side of the front insert position, and the edge line on the big toe side extends from the apex to the rear of the front insert position, so that the big toe can securely grasp the step with a fist movement, which strengthens the muscles of all the toes and makes it easier to correct the overall deformation of the foot shape. The positioning of the edge line on the big toe side is aimed at being able to accommodate the big toe of almost everyone.

[0023] In particular, the length of the big toe varies from person to person, and is not exactly the same even for people with the same foot size, so based on the results of measurements of the ratio of the length of the toes to the total length of the feet of many people, it was found that it is best to set the step so that it is slightly closer to the base of the toes. Specifically, it is preferable for the distance from the center position of the edge line on the big toe side of the front edge of the above-mentioned L-shape to the front end of the base to be in the range of 18 to 22% of the maximum length of the sandals in the front-to-back direction, which corresponds to the total length of the foot, and more preferably, 19 to 20% on average.

[0024] The thickness of the front edge that forms the step is preferably in the range of 2 mm to 10 mm, which allows fingertips to easily catch. If the thickness is smaller than this lower limit, the catch is insufficient and there is little difference between the presence or absence of a step. If it is too thick, exceeding 10 mm, the step may be too high, making it difficult to walk.

[0025] In addition, the sandals of the present invention are desirably lightweight so that they can be used frequently in daily life other than when going out, such as commuting to work or school. In conventional sandals, the lightweight types use cut cork or molded synthetic resins such as polyurethane (PU) and ethylene vinyl acetate (EVA) resin as the base. It is preferable to use a lightweight material for the base of the sandals of the present invention as well. Among them, EVA resin is preferable because it is lighter and there is no need to worry about deterioration over time due to hydrolysis, unlike polyurethane. In addition, EVA may be blended with other resins to make a material with improved abrasion resistance and durability.

[0026] Furthermore, if the material used is thermoplastic and can be molded using a mold, including EVA, the base can be molded into any shape. For example, it is easy to integrally form anti-slip protrusions and grooves on the underside of the base, which will become the bottom of the sandals. In addition, the base can be molded using a mold to create a curved cross-sectional shape with a continuous change in thickness over its entire length, such as by curving the toe or making the center concave.

[0027] Furthermore, if a mountain-shaped convex portion is integrally provided on the base over the area where the bases of the second to fourth toes of the sole come into contact, this mountain-shaped convex portion will appear on the top surface even after the first covering member and the second covering member are stacked. This convex portion pushes up the bases of the second to fourth toes of the sole in a slightly mountain-like shape, making it easier to maintain an arch along the left and right width direction of the foot. This width direction arch, together with the front-back vertical arch called the arch of the foot, is necessary for the spring action that generates power when stepping out, the cushioning action that absorbs impact when touching the ground, and the stabilizing action when standing on one foot, but even if this arch is crushed and the foot is in a splayed state, it is thought that twisting force is easily applied to the base of the big toe, making it easy to develop hallux valgus.

[0028] In addition, the two straps, one on the big toe side and one on the little toe side, extend backwards from the front part in an V-shape and place on the instep of the foot. However, in order to make the sandals of this invention easy to wear and walk in on a daily basis except when going out, the straps are not thin strings, but rather have a certain width to gently touch the instep.

[0029] In addition, it is preferable to design the side strap on the thumb side to be wider than the side strap on the little finger side so that it can cover the MTP joint part that protrudes outward from the base of the thumb. When wearing regular sandals with hallux valgus, the normal thin side strap hits the protruding part at the base of the thumb and causes pain, but by using a wide side strap that contacts the base widely to cover it, pain can be avoided. Also, it is possible to support the force that moves the thumb outward from the second toe without pain.

[0030] Specifically, for example, the little finger side strap should have a width of about 1.5 to 2.5 cm, and the thumb side strap should be shaped so that the width is greatest at the base of the thumb, with a maximum width of about 3 to 5 cm. Alternatively, the width should be about 1.2 to 3 times the width of the little finger side strap, which is located symmetrically to the maximum width of the thumb side strap.

[0031] It is also desirable for the cross straps to have cushioning properties. For example, a cross strap with cushioning properties can be easily produced by filling a piece of fabric of a given shape with a cushioning material such as polyurethane foam, folding the fabric, and sewing the ends together. The front part can be formed by forming the tip part that will become the front part integrally with the cross strap, and sewing the tips of the left and right cross straps together. In this case, there is no need to prepare a separate member for the front part, and when cutting the fabric, the width, inclination, and other design details of the part that corresponds to the front part can be freely determined.

[0032] In the construction of the sandals of this invention, since the second covering member is what actually comes into direct contact with the sole of the foot, it is desirable to select a material that provides a pleasant feel. For example, it is preferable to first select a material that can eliminate the discomfort caused by dampness on the sole of the foot. For this reason, a tatami mat sheet made of natural or artificial rush grass materials is a suitable material. Rush grass has humidity control, moisture retention, and heat insulation properties. Natural rush grass has a unique fragrance that gives a feeling of cleanliness and freshness.

[0033] Such a tatami covering sheet can be placed on top of the first covering member as the second covering member by not only bonding with an adhesive or the like, but also sewing. However, to prevent the edge of the tatami covering sheet from directly touching the soles of the feet, the tatami covering sheet should be sewn to the base with the edges covered by another edge cloth around the entire circumference, in the same way as normal tatami coverings are sewn via the tatami edges.

[0034] The first covering member is not particularly limited as long as it has a moderately smooth surface, since the surface of the first covering member is essentially only touched by the pads of the toes protruding from the second covering member. However, since it is desired that the first covering member has a relatively high mechanical strength, is not easily broken, is low cost and easy to mold, a synthetic resin material such as polypropylene or polyester is preferable. The first covering member may be attached to the upper surface of the base by adhesive or fusion bonding, or sewn in the same manner as the second covering member. EXAMPLES

[0035] A pair of zori according to an embodiment of the present invention is shown in Figs. 1 to 3. For the sake of simplicity, a pair of zori is symmetrical, and the zori for the left foot is taken as an example for explanation, and the zori for the right foot is omitted from illustration and explanation. Fig. 1 (a) is a side view of the big toe side, (b) is a perspective view of Fig. 1 (a) tilted slightly, (c) is a perspective view from the toe side, and (d) is a state diagram when the zori in Fig. 1 (c) is worn. Fig. 2 (a) is an enlarged side view of the toe part on the little toe side, and (b) is a schematic enlarged view of the toe part showing only the base in a partial cross section of AA in Fig. 1 (c). Fig. 3 (a) is an overall perspective view from the little toe side, and (b) is a state diagram when the zori in Fig. 1 (a) is worn and stepped out.

[0036] The sandals 1 according to this embodiment are based on a base 10 made of non-foamed EVA, and have an upwardly curved toe 11, a heel 12 with chamfered edges, and a number of anti-slip projections 14 and grooves 15 formed on the bottom surface 13. Furthermore, the top surface has a gentle concave shape from the toe to the heel, and a mountain-shaped protrusion 16 is provided over the area where the bases of the second to fourth toes come into contact. The base 10 of this shape can be easily manufactured as an integrally molded product by, for example, injection molding of a thermoplastic material into a mold, or by pressurizing and heating a pellet-like material in a mold.

[0037] The upper surface of the base 10 is covered with a first covering member 17 made of a plastic sheet with relatively low water absorption, such as polypropylene, polyester, etc. The first covering member 17 is attached to the base surface by sewing it through another border cloth 18 that is bordered all around.

[0038] On the front (top) surface of the base 10 to which the first covering member 17 is attached, a front attachment hole 30 is formed from the center of the front toward the thumb in order to attach the thong 40, and two rear attachment holes (31, 32) are formed near both the left and right edges of the rear.

[0039] A second covering member 20 is further attached to the upper surface of the first covering member 17, covering a partial area thereof. The front mounting hole 30 and the rear mounting hole (31, 32) are set to be located outside the area of ​​this second covering member 20. The second covering member 20 is a tatami facing sheet made of natural rush grass materials or artificial rush grass materials such as Japanese paper, and is sewn onto the base 10 via another border cloth 21 that borders its entire perimeter.

[0040] The front edge 22 of the second covering member 20 in the foot width direction has a thickness of 2 to 10 mm, and forms a step 24 with respect to the surface of the first covering member 17. This front edge 22 is V-shaped along a line connecting the depressions between the pads and bases of all toes on the sole of the foot, and of this V-shaped front edge 22, an edge line 23 on the big toe side extends from the apex of the V-shape to the rear of the front attachment hole 30 for the front base insert. Specifically, the distance Y from the center position of the edge line 23 on the big toe side to the front end of the base is 19 to 20% of the maximum overall length X of the sandals corresponding to the foot size.

[0041] Here, the present embodiment will be exemplified by an S-size pair of sandals 1 with a maximum total length X of 23 cm. In this pair of sandals 1, the distance Y is 45 mm, which is approximately 19.6% of the total length X. In most S-size feet, this pair of sandals 1 is designed so that when the toes are made to make a fist, the big toe can also securely grasp the step 24 of the edge line 23 on the big toe side with the pad of the big toe.

[0042] In addition, the tip of the front part 41 of the thong 40, and the ends of the little finger side cross strap 42 and the thumb side cross strap 43 extending respectively to the rear on both the left and right sides from the front part 41 are inserted and fixed into the front mounting hole 30 and the left and right rear mounting holes (31, 32) formed in the area of ​​the first covering member 17.

[0043] The thong 40 in this embodiment is composed of two horizontal strap base materials. That is, an extended portion is provided at the front end of each horizontal strap (42, 43), and the extended portions are sewn together to form the front part 41. Therefore, the front part 41 and each horizontal strap (42, 43) of the thong 40 are continuous. Each of the two horizontal strap base materials is formed into a belt-like shape of a specified width by folding a single piece of fabric and sewing the ends together with a cushioning material such as polyurethane inside. For the fabric, a wide variety of commonly used fabrics can be used, such as polyester, cotton, or a mixture of these.

[0044] In this embodiment, the little toe side strap 42 has a gentle curve from the front end to the back end so that the center is slightly wider. In this S size sandals 1, the width of the front and back ends is about 15 mm, and the width of the center is about 25 mm. Similarly, the thumb side strap 43 is formed into a belt-like shape by folding a single piece of fabric, filling it with cushioning material, and sewing it together. This kind of width and cushioning of the straps (42, 43) is gentle on the instep and easy to wear on a daily basis.

[0045] The thumb-side cross strap 43 has the same width at the front and rear ends as the little finger-side cross strap 42, but the width D of the part that touches the base of the thumb is 1.5 times wider than the width d of the little finger-side cross strap 42 at the symmetrical position. In the S-size sandals 1 here, the width d of the little finger-side cross strap 42 is about 20 mm, while the maximum width D of the thumb-side cross strap 43 is about 35 mm. This wide part of the thumb-side cross strap 43 touches the base of the thumb so that it covers it, so even if the thumb has hallux valgus, it wraps around the protruding part, making it easy to wear without feeling any pain. In addition, the front part 41 can support the thumb to be biased away from the second toe against the valgus.

[0046] The front part 41 of the thong 40 is formed by sewing together the extensions from the front ends of the two horizontal straps (42, 43) as described above, and both parts contain cushioning material, so even if the front part 41 is relatively thick, it can urge the big toe and second toe in a direction away from each other without causing pain between the toes. Furthermore, the front part 41 is strip-shaped with a width in the front-rear direction of the base and inclined backward, so that the urging force is effectively applied along the length of the toes, so that the big toe and second toe can be opened well just by wearing it. In the S size sandals 1 of this embodiment, the maximum thickness of the front part 41 is about 5 mm, the width is 10 to 15 mm, and the backward inclination angle α from the base surface is 55 degrees.

[0047] In addition, the base 10 has a mountain-shaped convex portion 16 over the area where the bases of the second to fourth toes of the sole come into contact, so that the convex portion 16 is visible even when the first covering member 17 and the second covering member 20 are overlapped. This convex portion 16 makes it easy to maintain the arch in the left and right width direction of the sole. When the arch is collapsed, a twisting force is applied to the base of the big toe, which can worsen hallux valgus, but this can be avoided.

[0048] When wearing the sandals 1 of this embodiment with the above configuration, the space between the big toe and the second toe is first widened. Then, as shown in Fig. 3(b), when you start to walk, you push your toes and bend the top of your foot upward while gripping the ground, and the pads of all your toes get caught on the steps 24 on the front edge 22 of the second covering member 20, naturally making a fist-clenching motion by gripping the steps 24. By continuing to walk, the fist-clenching motion is promoted and can be easily repeated.

[0049] In the above embodiment, an example of an S-size sandal was shown, but the material of each part is not limited to this and can be selected as appropriate. In addition, if the numerical values ​​are set according to the conditions for M, L, LL, etc., and the product is prepared, the effect of this invention can be achieved by people with various foot sizes. [Explanation of symbols]

[0050] 1: Sandals 10: Pedestal 11: Toe area 12: Heel 13: Bottom 14: Protrusion 15: Groove 16: Convex 17: First covering member 18: Edge fabric 20: Second covering member 21: Edge fabric 22: Anterior margin 23: Edge line on thumb side 24: Step 30: Front mounting hole 31, 32: Rear mounting holes 40: Thong 41:Maetsubo 42: Pinky side strap 43: Thumb side strap

Claims

1. A pair of sandals comprising a base, a front part having a tip inserted and fixed into a front mounting hole formed in the front part of the base, and two horizontal straps extending from the front part to both the left and right rear ends inserted and fixed into two rear mounting holes formed near the left and right edges of the rear part of the base, the front part being a band-like strap having a width in the front-to-rear direction of the base, the base is a molded product made of synthetic resin, and includes a first covering member that covers an upper surface of the base, and a second covering member that further covers a partial area of ​​the upper surface of the first covering member; the second covering member has a predetermined thickness that forms a step with respect to a surface of the first covering member at a front edge in a lateral width direction of the foot, The front edge has a dogleg shape along a line connecting the depressions between the pads and the bases of all the toes on the sole of the foot, and the apex of the dogleg shape is located on the little toe side of the position where the front part is inserted into the base, and the edge line on the big toe side extends from the apex to the rear of the position where the front part is inserted, The base is provided with a mountain-shaped protrusion integrally over an area where the bases of the second to fourth toes come into contact.

2. 2. The sandals according to claim 1, wherein the edge of the second covering member that forms the step has a thickness of 2 mm to 10 mm.

3. 2. The sandals according to claim 1, wherein the front part has a maximum thickness of 5 to 8 mm.

4. The zori sandals according to claim 1, characterized in that the two side straps of the thong have a band-like shape with a certain width, the width of the side strap on the thumb side is maximized at the base of the thumb, and the maximum width is 1.2 to 3 times larger than the width of the side strap on the little finger side, which is located at the symmetrical position.

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