Abstract: Disclosed herein is a flexible contoured footbed insole for footwear for providing an anatomically correct foot support to a wearer of the footwear. The flexible contoured footbed insole comprises a heel section and a support system extending anteriorly from the heel section. The heel section comprises a cup shaped structure for accommodating a heel of a foot of the wearer. The support system comprises an inner longitudinal arch support, an outer longitudinal arch support, a transverse arch support, a metatarsal arch support, and a toe support for supporting an inner longitudinal arch, an outer longitudinal arch, a transverse arch, a metatarsal arch, and toes of the foot of the wearer respectively. The flexible contoured footbed insole may further comprise a flexible structure disposed within the support system. The flexible structure provides flexibility and freedom of movement to the foot of the wearer.

Abstract: A foot orthotic device is disclosed. More specifically described is an individualized foot orthotic device to correct and/or restore the ideal alignment and/or positioning of foot structures. The device is designed using a method and system that applies sequential pressure to regions on a plantar foot surface, and obtaining positional information about each region. Based on the positional information, an orthotic profile is determined, for design of one or more custom, individualized foot orthotic devices for a subject.

Abstract: There are provided in accordance with the present invention adjustable orthopedic insoles including a foothold having a base frame, a medial arc support and a tarsal support, so that a camber located beneath the medial arc support provides a clearance located between the foothold, and at least one arcuate abutment mountable in the aforementioned camber. Conjointly, a methods of adjusting orthopedic insoles to a user employing a set of adjustable orthopedic insoles including selecting the most comfortable combination of the footholds and arcuate abutments and of adjusting metatarsal support of the orthopedic insoles of by selecting the most comfortable metatarsal insert are further disclosed.

Abstract: An insert for a shoe includes an insole for fitting into a shoe and a molded support structure fitted within the insole and a plurality of arch carriers, each of which is shaped to fit in a matting relationship with the molded support structure, where a user selects one of the plurality of arch carriers and inserts the arch carrier into the molded support structure.

Abstract: A device is disclosed comprising a contour configured to engage a foot and supported by a response assembly, the response assembly configured to mechanically respond to pressure applied to the contour. The contour may comprise at least one stimulating mound configured to engage at least one non-medial arch of the foot and/or a heel ridge for dividing the heel from the rest of the foot. A control circuit is disclosed that may communicate with an orthopedic device to create a pressure reading used to control a point of response and/or a stimulating mound. The device may include a second contour configured to engage a second foot supported by a second response assembly. Methods of using the device are disclosed. The device may be an orthopedic device and/or a sports training device. A shoe insert and shoe are disclosed, each comprising a contour including at least one stimulating mound.

Abstract: The invention relates to an item of footwear which has an integrated midfoot roll and of which the upper is connected to an insole and an outsole shell (5). According to the invention, the outsole shell (5) contains two mouldings (3, 4) located one above the other, wherein the moulding (4), which is arranged at the bottom of the outsole shell (5), is harder than the moulding (3), which is located on top, and the outsole shell (5), and wherein the top moulding (3) is softer than the outsole shell (5).

Abstract: An orthopedic foot appliance providing optimal and adaptable comfort and shock absorption while at the same time varying degrees of heel support, arch support and motion control depending on the foot type and footwear. The foot appliance consists of a cushioning insole and a re-attachable support piece for attaching and re-attaching to the insole.

Abstract: An orthopedic foot appliance providing optimal and adaptable comfort and shock absorption while at the same time varying degrees of heel support, arch support and motion control depending on the foot type and footwear. The orthopedic foot appliance consists of a cushioning insole and a re-attachable support piece for attaching and re-attaching to the insole. The insole includes a trim line allowing the insole to be adapted to a three quarters length of a full insole. The three quarters length may extend form from the back of the heel to the metatarsal heads. The support component may be constructed from any of a group of materials including polyethylene, polypropylene and polypropylene incorporating glass or silica.

Abstract: An article of manufacture for an Orthotic arch support utilizing triangular shaped heel anchors to minimize slippage inside the shoe when it is worn.

Abstract: A sole adapted to provide improved leverage during the toe-off stage of gait comprises elongate elements (2a-e) along the horizontal surface of the sole. The elongate elements (2a-e) are adapted to tauten in response to longitudinal forces on the sole, increasing the rigidity of the midsection of the sole and providing effective propulsive assistance to the athlete.

Abstract: An orthotic insert (1) having a first (2) and second portion (3), the second portion being formed of a material of higher resistance to deformation than the first portion (2), wherein the insert (1) is heat mouldable to conform to a patient's foot. The first portion (2), which forms the main body of the insert (1) provides support for the fore foot, while the second portion (3) is substantially U or J-shaped and extends around the heel region and into the arch region of the patient's foot. Preferably both portions are formed from heat mouldable ethyl vinyl acetate.

Abstract: A foot orthosis device which may be used with footwear to provide arch support for the purpose of relief of physical discomfort such as pain of the foot due to such conditions as over use of longitudinally directed muscles, tendons, and ligaments located between the metatarsal and calcaneal section of the bottom of a human foot. The orthosis device can placed between the existing removable sole and non-removable platform, or above the non-removable sole, or may be integral with a portion of the footwear.

Abstract: A foot support insole having four different versions, each providing differing degrees of arch support for use in any shoe or boot. The insole is biomechanically shaped to support the medial arch, the lateral arch, the metatarsal arch, and the heel. In each of these versions, the principal variable is the extent of support for the medial arch. Low, medium, high, and extreme foot support versions are disclosed. The insole design effectively distributes the weight-generated forces provided by the user into a neutral plantigrade position. Supporting the neutral position for the foot obtains optimum balance and weight distribution by dispersing the forces applied by the foot over the greatest area possible within the shoe. The insole allows the three foot arches to work together and function as a structural support tripod, alternatively absorbing compressive forces and recoiling into a stable support state.

Abstract: A children's shoe (1) for the stimulation of the plantar arches to the ends of the prevention or cure of flat foot, comprising a cushion-shaped element (6) having a sandwich-shaped construction, extending in correspondence of the internal portion (4) of the sole (3) of the shoe (1) and exhibiting a substantial elastic deformability during a subject's walking cycle.

Abstract: A shoe comprising: an assembly of a shoe upper and sole unit for supporting a foot, the assembly defining a foot compartment that orients a foot in an objective (desired) tri-planar alignment to affect three areas of the foot anatomy simultaneously: (1) the sustentaculum tali; (2) the lateral calcaneus; and (3) the fifth metatarsal ray of the foot. In certain embodiments the shoe compartment is configured to correct an adverse internal rotation of the talus by: (1) vertical lift on the ST; (2) varus movement of the calcaneus; and (3) fifth ray pressure to adduct the forefoot.

Abstract: Orthotic devices are configured to provide static and dynamic stability to the medial arch and subtalar bone complex. The orthotic device includes a resilient arch support configured to collapse under the weight of a user. Collapsing causes an operably coupled vertical support flange to pivotally urge the vertical support flange against corresponding medial areas of the foot. A method entails translating a downward force exerted by a foot during walking motion into pivotal motion of the vertical support flange. Pivotal motion urges the flange against corresponding areas of the foot to providing a stabilizing force. As the downward force is relieved, the stabilizing force is relieved and the medial support flange returns to its original position.

Abstract: An orthotic is disclosed. The orthotic may include a cushioning layer configured to extend from at least the metatarsal region to the proximal heel region, the cushioning layer having a heel region with a protruding heel piece integrally molded as part of the cushioning layer. The orthotic may also include an outer shell layer fixedly coupled to the cushioning layer, the outer shell layer extending longitudinally from at least the medial cuneiform-first metatarsal joint region to the calcaneus bone region of the user, the outer shell layer configured to receive the protruding heel piece.

Abstract: A slipper includes a sole, a pad securely attached to the sole and a top securely mounted on top of the pad and having a strap in connection to opposite sides of the top. An arch insert is sandwiched between the sole and the pad for providing comfort to a foot arch.

Abstract: An example orthotic is described which may include a cushioning first layer and a shell layer. The shell layer may be configured to extend longitudinally from at least the talus-navicular joint to the medial cuneiform-first metatarsal joint and laterally under at least the medial cuneiform bone when the orthotic is in use. The shell layer may be configured to receive a removable insert that alters an amount of arch support provided by the orthotic. A set of inserts may be provided to allow the example orthotic to be customized based on user support preferences.

Abstract: An insole including a main body having a bottom face and a top face with a configuration adapted to a curvature of a human sole. The top face has a heel section, a hollow section and a toe section. The heel section has a substantially concaved structure with a higher periphery and a lower central portion. The hollow section integrally forward extends from the heel section and has a substantially convex structure adapted to the configuration of human sole. The hollow section gradually ascends in accordance with an inner side of the human sole, whereby the insole can snugly and tenderly attach to the heel and hollow of the human sole. The bottom face is a plane face. Two sides of the bottom face upward extend to increase the contact area with the ground and enhance firmness and flexibility of the insole.

Abstract: An orthopedic insert is disclosed that comprises an orthotic shell and a plurality of cuts made about at least a portion of the periphery of the orthotic shell. The orthotic shell typically comprises an arch portion made of a semi-flexible material. As a patient's weight is applied to the insert, and particularly the orthotic shell, the cuts localize the flexing in the arch portion as a result of the downward force being applied by the patient, thus reducing pressures along the orthotic edges and diminished muscle strain.

Abstract: Footwear including an insole formed for relieving pressure on a common digital nerve of a foot. The insole has heel, mid and forefoot sections. The forefoot section of the insole is formed with a pad having a neuroma pad section which underlies the third and fourth metatarsal heads of the foot, so that when a bottom of the foot is placed on the insole, the neuroma pad section applies an upward force to the bottom of the foot sufficient to spread the third and fourth metatarsal heads away from one another and thereby relieve pressure on the third common digital nerve to reduce the risk of neuroma. In other embodiments, the pad is formed as a separate pad for placement in footwear. An insole designed for use with thonged footwear is also disclosed.

Abstract: A one-piece molded orthotic insert having a shape for controlling and directing the motions of the foot. The insert has a unitary body that is formed of a rigid, resiliently flexible, substantially noncompressible material, so that the insert will flex with the shoe but will not compress or deform, so that a correct shape is maintained through the gait cycle. The insert includes a raised arch portion that is supported by a plurality of underlying, vertical ribs. The ribs are spaced apart and free from connection with one another, so that the lower edges of the ribs are able to spread as the insert flexes along its lengthwise axis, so that the insert flexes generally uniformly when walking and without distortion of its shape. The layer of material overlying the ribs has a thickness generally similar to that in the reset of the body, and the ribs also have a generally similar thickness, facilitating manufacture by injection molding.

Abstract: An arch support orthosis includes an arch curve being variably tensioned for supporting a user's arch and foot. The arch support orthosis includes a metatarsal curve, a curved heel portion and a continuous medial longitudinal arch curve. An anterior slope and posterior slope of the arch curve include varying thicknesses from the base of each slope to a crown of the arch curve. A greater base thickness of each anterior and posterior slope provides firm support of the respective anterior curve and posterior curve of a user's arch, with the crown being resiliently supportive of the user's arch during weighted and unweighted use. A means for tensioning having an adjusting means are connectable under the continuous arch curve between the anterior and posterior slopes, thereby allowing a user to adjust angles of the respective slopes and the tension along the arch curve for treating plantar fasciitis and other foot disorders.

Abstract: An arch support device has a lower layer of a semi-rigid material shaped to conform to the arch of a wearer's foot and to provide an arch supporting function when inserted in a shoe, a second layer of cushioning material such as foam secured to the upper face of the lower layer; and a third, cover layer of pliable material secured over the second layer. At least one of the lower and foam layers is of variable thickness.

Abstract: An arch support device has a periphery shaped to conform to at least part of the periphery of the sole of a wearer's footwear, an upper surface, a lower surface, a heel region, an arch region, and a toe region, each region being designed to lie under the corresponding regions of a wearer's foot when in use. At least part of at least one of the surfaces of the device has a slip-resistant surface texture for resisting slipping, with the textured surface formed during injection molding of the device in a mold which is roughened over at least part of its surface. Slip-resistant surface portions on both the upper and lower surface will resist slipping of a wearer's foot relative to the device and slipping of the device relative to the footwear.

Abstract: An arch support orthosis includes an arch curve being variably tensioned for supporting a user's arch and foot. The arch support orthosis includes a metatarsal curve, a curved heel portion and a continuous medial longitudinal arch curve. An anterior slope and posterior slope of the arch curve include varying thicknesses from the base of each slope to a crown of the arch curve. A greater base thickness of each anterior and posterior slope provides firm support of the respective anterior curve and posterior curve of a user's arch, with the crown being resiliently supportive of the user's arch during weighted and unweighted use. A means for tensioning having an adjusting means are connectable under the continuous arch curve between the anterior and posterior slopes, thereby allowing a user to adjust angles of the respective slopes and the tension along the arch curve for treating plantar fasciitis and other foot disorders.

Abstract: A design concept for foot orthotics having several different optional features and sub-features is disclosed. The design is useful for supporting and correcting abnormal foot posture. The disclosure contemplates different types of footwear in addition to user's gender, age, weight, foot size, activity level and medical condition. Varying types of midfoot sections and heel portions are employed having specific arch support. The design further provides the benefits of custom foot casting while having mass producible parts. Also disclosed are design choices for thickness and width of the orthotics and preferred materials for a wide range of applications. Additionally, a method is disclosed for choosing particular orthotics for a particular person from a set of total possible orthotics available. The set of orthotics will contain sub-sets of specific arch heights, widths and thicknesses of orthotics.

Abstract: An orthotic that supports the arch of a foot during and after extensive use and is flexible to allow a person to comfortably walk and/or run is provided. The orthotic comprises a bottom surface including a mid-plantar region having a perimeter that includes a front portion, a rear portion opposite the front portion, a left side portion and a right side portion opposite the left side portion, and a plurality of longitudinal and lateral ribs in the mid-plantar region. Each longitudinal rib extends toward the front and rear portions of the perimeter but not across the mid-plantar region. Each lateral rib extends from a respective longitudinal rib toward one of the side portions of the perimeter. To reduce the stress concentrated in the intersections of the longitudinal ribs with the lateral ribs when the mid-plantar region is flexed, the angle formed between the longitudinal and lateral ribs may be greater than 90° or the ribs may be curved.

Abstract: A metatarsal arch support is described, in which the support has a raised section of such a size and shape as to roughly match and fill the open space that exists between the insole of the shoe and the portion of the foot that spans the second, third, and fourth metatarsals, which normally constitutes an arch when the foot is supporting body weight. Shoes typically exert pressure, causing the metatarsal arch to flatten. Use of the arch support prevents this undesirable effect.

Abstract: A metatarsal arch support is described, in which the support has a raised section of such a size and shape as to roughly match and fill the open space that exists between the insole of the shoe and the portion of the foot that spans the second, third, and fourth metatarsals, which normally constitutes an arch when the foot is supporting body weight. Shoes typically exert pressure, causing the metatarsal arch to flatten. Use of the arch support prevents this undesirable effect.

Abstract: An insole includes a forefoot portion having a lower first recess; a cupped heel portion having a lower second recess; a mid-foot portion connecting together the forefoot portion and the heel portion, the mid-foot portion including a medial arch portion, and the forefoot, heel and mid-foot portions formed from a unitary resilient material; a plurality of protuberances in the second recess and having lower edges generally coplanar with a lower surface of the heel portion in surrounding relation to the second recess; a plurality of spaced apart spring walls formed from a viscoelastic gel in the first recess, the spring walls having lower edges generally coplanar with a lower surface of the forefoot portion which is in surrounding relation to the first recess; and a shell extending under the mid-foot portion and made of a resilient material that is stiffer than the unitary resilient material.

Abstract: A shoe insole having an axis and an arch area with an upper surface and a bottom. The insole has three or more supporting ridges, positioned under the upper surface in the arch area, to provide support to a wearer's arch while allowing the insole to remain flexible as the wearer walks.

Abstract: An orthotic device which provides functional support for the foot. It comprises a substantially rigid moulded sheet of resiliently deformable plastics material which provides continuous contact with the arch of the foot whether the foot is flat or pointed. The plastics material is preferably embedded between a shock absorbent layer and a covering layer.

Abstract: The invention relates to an apparatus and methods for incorporating a medial/lateral counter foot stabilizer into shoes. In an embodiment, the medial/lateral counter foot stabilizer of the invention comprises a plantar aspect which extends the length of the sole of a foot, side walls, a metatarsal arch support, a lateral arch support, a medial arch support, and a heel cup counter. The stabilizer of the invention mimics a preferred foot shape, provides support for the metatarsal, medial, and lateral arches, and restricts pronation and supination of the foot. The stabilizer of the invention is designed to be integrated into commercial shoes during the manufacturing process as a method of providing foot support which is currently unavailable in commercial shoes.

Abstract: An arch support device has a lower layer of a rigid or semirigid material shaped to conform to the arch of a wearer's foot and to provide an arch supporting function when inserted in a shoe, a second layer of cushioning material such as foam secured to the upper face of the lower layer; and a third, cover layer of pliable material secured over the second layer. The foam layer is of variable thickness, with a maximum thickness in a heel region and a minimum thickness in a toe region.

Abstract: An arch support device has a lower layer of a rigid or semirigid material shaped to conform to the arch of a wearer's foot and to provide an arch supporting function when inserted in a shoe, a second layer of cushioning material such as foam secured to the upper face of the lower layer; and a third, cover layer of pliable material secured over the second layer. The foam layer is of variable thickness, with a maximum thickness in a heel region and a minimum thickness in a toe region.

Abstract: An insole for footwear comprises a footbed having an upper surface and a lower surface, with a raised arch support portion on the upper surface of the footbed capable of supporting a longitudinal arch and a transverse arch of a human foot. The shape of the insole can generally correspond to the shape of a plantar surface of the human foot, thereby providing support to substantially the entire plantar surface of the foot.

Abstract: A foot orthotic (10) that more effectively supports and stabilizes a person's foot (14) and improves the person's balance so as to reduce tripping and falling. The orthotic device (10) includes several layers of material that are bonded together to cooperatively provide the optimum amount of support and stabilization for different areas of the wearer's foot (14). The orthotic (10) includes a bottom layer (16) that extends substantially the entire length of the wearer's foot (14) and that is placed over the insole of the wearer's footwear; a top layer (20) that also extends substantially the length of the wearer's foot and that receives and supports the plantar portion of the foot; and an intermediate layer (18) that is bonded between the bottom layer and the top layer. The orthotic (10) is configured to elevate the toes of the wearer and thereby enhance balance stabilization.

Abstract: An arch brace orthotic includes an adjustable arch curve having a plurality of extensions separated by incisions which separate the arch curve surface into multiple resiliently cantilevered extensions. The extensions adjust the arch curve height and slopes during each foot-strike along the arch curve. The weighted arch curve height is returned to an unweighted height by flexibly rebounding of each extension to support the arch of the user's foot. A tensioning means is connectable under the arch brace, providing adjustment of the arch curve height and slope to therapeutically support the user's arch. The arch brace is movable without disassembly between any shoe for treatment of arch and foot disorders. A method of treating plantar fasciitis and related foot disorders includes selectively and periodically adjusting the arch curve height and slopes by manipulating the tensioning means for therapeutic support and user controlled strengthening of the user's arch and foot.

Abstract: A contoured, pre-molded and heat moldable orthotic device (1), ideally of about three-quarters of the length of the boot or shoe in which it is to be worn, has a 4° rear foot varus angle or wedge with an integrally-formed heel cup (3), a longitudinally-extending “raise” (4), a metatarsal “raise” (5) and a spongy shock-absorbing insert (6). The device is intended to be purchase “off-the-shelf”, for the relief of generalized and relatively minor common biomechanical foot problems.

Abstract: An orthotic arch support including an intrinsically self-adjusting medial longitudinal arch curve including a plurality of generally adjacent incisions being generally transverse across the medial longitudinal arch curve. The incisions originate at a medial side of the arch curve, thereby separating the curved arching surface into a plurality of resilient extensions. The plurality of extensions are compressed against each other and self-adjust the arch curve height and slopes during each step. As weight shifts onto the posterior slope, the height of the arch curve is decreased by limited compression of each extension against adjacent extensions during each stride. Each resilient extension flexibly rebounds to return the arch curve to an unweighted height when weight shifts off of the arch curve. A tensioning means is insertable underneath the extensions to adjust the height and slopes of the arch curve, providing for user adjustment of the arch curve height and slopes as foot pain is reduced during use.

Abstract: An orthotic device for treating heel pain associated with Plantar Fasciitis is disclosed, comprised of a flexible heel cup shoe insert with a bar-shaped member extending laterally across the bottom sole portion of the device and located under the heel-arch connection of a person's foot when worn by the person in order to apply continuous accupressure to the calcaneus-midtarsal connection area and thus alleviate pain.

Abstract: A removable insole for insertion into footwear, includes a forefoot portion extending at least to metatarsals of a foot, with a second recess at an undersurface thereof with a plurality of cylindrical protuberances in the recess; a cupped heel portion including a relatively flat central portion and a sloped side wall surrounding the relatively flat central portion; a mid-foot portion connecting together the forefoot portion and the heel portion, the mid-foot portion including a medial arch portion defined by an extension of the sloped side wall, the sloped side wall extends to lateral and medial sides of the mid-foot portion, and the forefoot portion, heel portion and mid-foot portion formed from a unitary resilient material; a shell that extends along an underside of the insole, the medial arch portion and the sloped side wall at the heel portion and the mid-foot portion, the shell having an opening beneath the relatively flat central portion of the cupped heel portion and a gap at a rearmost end of the shel

Abstract: A removable insole for insertion into footwear, includes a forefoot portion for extending at least to metatarsals of a foot; a cupped heel portion having a varus of approximately 7 degrees for the left foot and approximately 5 degrees for the right foot, which slopes from a medial side of the insole to a lateral side of the insole; a medial arch portion connecting together the forefoot portion and the heel portion, and which extends forwardly to approximately a first metatarsal of a foot supported thereby, and extends rearwardly of a front section of the heel portion; an upper surface extending along the forefoot, arch and heel portions, and having a downward inclination from the heel portion to a front section of the arch portion of approximately 2 degrees; and a lateral flange extending around a periphery of at least the heel portion and extending forwardly at least to a midfoot portion of the insole to prevent abduction of a foot supported thereby.

Abstract: An dispersive pad to accommodate a common metatarsalgia has a unitary pad of a flexible material such as neoprene. The pad is shaped to fit in a toe box of a shoe. The pad has a thin arch part, a thin toe part, and a thinner valley between the arch part and the toe part. The valley is defined by thicker pontoons on either side of the thinner valley.

Abstract: An insole assembly for footwear includes a cushioning member and an underlying resilient support member. The cushioning member has an undersurface with a first region beneath a wearer's heel and a second region extending beneath a wearer's arch. The resilient support member has a body and at least one resilient cantilevered arm with a first end attached to the body and a second end extending beneath the second region of the cushioning member. The cantilevered arm defines an arch support surface in supporting engagement with the undersurface of the cushioning member.

Abstract: The subject invention is aimed at providing a sole pad unit with the effects of supporting the metatarsal bone and airing and massaging the center of the sole of foot, comprising mainly of a massage block, roughly in an "L" shape, located on the sole pad unit to correspond to the depressive part on the sole of foot, providing proper stimulation to the depressed part on the sole of foot, complying with ergonomic principles, at approximately the center of the massage block is a vent hole to produce airing effect and prevent bad smell, meanwhile there are slopes on the peripherals to prevent deformation of the massage block, the sole pad unit is applicable to slippers as well as all types of shoes, to achieve the effects of universal application and best comfort, and to achieve the purpose of better health with the massage block to support the metatarsal bone and massage the reflective area of acupoints on the depressed part of the sole of foot.

Abstract: An insole insert comprises a body having a bottom portion, a heel edge, a lateral side edge, a medial side edge, a depression portion spaced generally centrally beneath the user's first metatarsal phalangeal joint, a heel portion formed along the heel lateral side edges and extending forwardly to just rearwardly of the user's fifth metatarsal phalangeal joint, and an arch portion formed along the medial side edge and extending forwardly to just rearwardly of the depression portion. The heel portion and the arch portion, which form a channel that is laterally angularly offset relative to the insole insert, are configured to cooperatively redistribute the normally greater weight-generated forces applied to the inner and more bony regions of the user's heel outwardly toward the outer and more fleshy regions of the user's heel.

Abstract: A shoe pad having massaging effect of the type which is made from resilient and soft plastic material is provided. The shoe pad includes a lower layer and an upper layer. The upper layer is provided with a plurality of bulbs which are evenly distributed over the upper surface of the upper layer. The upper layer further includes a first cell corresponding to the sole of the foot and a second cell corresponding to the heel of the foot. The first and second cells are connected by a connecting passage such that a fluid communication therebetween is established. The upper layer further includes a bulged portion corresponding to the plantar arch of the foot. The lower layer is provided with a planar configuration and is provided with a first and second recesses corresponding to the first and second cells of the upper layer. Wherein when the upper layer is attached to the lower layer, the bulbs can be filled with air and a receiving space can be defined between the cells and the recesses.