A method for manufacturing a sole of an article of footwear uses an additive manufacturing through a 3D printer. The sole body 20 has an inclined surface or a curved surface BL.sub.0 to be a supported surface by a support at a toe spring portion Tu/a heel-up portion Hu/a side-up portion Su. The method includes a forming process in which a plurality of pillar-shaped supports 20sp that extend from the inclined/curved surface BL.sub.0 toward the bottom surface of the sole at the time of forming the sole through the 3D printer, and a cutting process to cut at least a portion of the pillar-shaped supports 20sp.

A footwear construction capable of incorporating one to three platform layers, or no platform layers at all. The invention comprises a kit including a sneaker member, optionally includable in the final construction first second and third platform members, guide members, optionally in sets of three, suitable for inclusion in a constructed footwear item with one, two or three platform members, and a tread its sole member, optionally replaceable by other types of soles.

A midsole for a shoe, in particular a running shoe, is described which midsole is asymmetric in a midfoot area, has an upper heel portion embracing the calcaneus of a wearer and has an upwardly extending toe end. In the midfoot area a vertical medial support structure originates from the midsole and supportively embraces the arch. Correspondingly, a vertical lateral support structure supports the lateral side of the foot in the midfoot area. The medial support structure covers a larger area than the lateral support structure, and is connected to the vertically extending upper heel portion of the midsole. The toe end of the midsole is extended upwardly, and provides in combination with the vertically extending upper heel portion and the vertically extending medial and lateral arch support structures a midsole which firmly embraces the foot. The resulting shoe reduces the risk of injury during running.

A sole structure for an article of footwear is provided. The sole structure includes an outsole having a ground-engaging surface and an upper surface formed on an opposite side of the outsole than the ground-engaging surface. A first cushion is disposed proximate to a medial side of the sole structure and includes a first fluid-filled chamber attached to the upper surface of the outsole and a second fluid-filled chamber attached to the first fluid-filled chamber and disposed between the first fluid-filled chamber and the upper. A second cushion is disposed proximate to a lateral side of the sole structure and includes a third fluid-filled chamber attached to the upper surface of the outsole and a fourth fluid-filled chamber attached to the third fluid-filled chamber and disposed between the third fluid-filled chamber and the upper. The second cushion is fluidly isolated from the first cushion.

A dual-hardness outsole includes a front section, a middle section, and a rear section, at least the middle section of the outsole including a wedge having a bottom surface which extends below another bottom surface of at least one of the front and rear sections such that the wedge carries more weight than the other bottom surface. The outsole comprises a hard portion and a soft portion that are secured to each other and together form the wedge, a cross-sectional profile of the hard and soft density portions being such that a center portion of the wedge is softer than opposite lateral portions thereof.

An orthotic support insert is configured to be positioned within a shoe. The insert is formed of a cushioning material having a plurality of indicator lines.

An orthotic support assembly is disclosed herein that includes an internal device configured to be inserted within a person's footwear. The internal device is formed of a cushioning material and extends from an internal surface at a bottom portion of the footwear to an internal surface of a top portion of the footwear.

An orthotic support assembly is disclosed herein that is configured to be attached to a patient's foot. The support assembly defines a first, internal device and a second, external device. The internal device defines at least a portion that extends to a top of a user's foot when positioned within the external device.

A sole structure for an article of footwear is provided. The sole structure includes an outsole having a ground-engaging surface and an upper surface formed on an opposite side of the outsole than the ground-engaging surface. A first cushion is disposed proximate to a medial side of the sole structure and includes a first fluid-filled chamber attached to the upper surface of the outsole and a second fluid-filled chamber attached to the first fluid-filled chamber and disposed between the first fluid-filled chamber and the upper. A second cushion is disposed proximate to a lateral side of the sole structure and includes a third fluid-filled chamber attached to the upper surface of the outsole and a fourth fluid-filled chamber attached to the third fluid-filled chamber and disposed between the third fluid-filled chamber and the upper. The second cushion is fluidly isolated from the first cushion.

An article of footwear includes an upper, a midsole, and an outsole, where the midsole is located between the outsole and the upper. A wedge is located between the outsole and the midsole and is preferably made of a material that is less compressible than the midsole. A flexible cage is located on the exterior surfaces of the upper and midsole. In embodiments, the flexible cage is designed to limit the outward expansion of the midsole when the midsole is compressed under load, and thus effectively stiffen the midsole. The total compression of the midsole of the article of footwear is based, at least in part, on a desired orientation of the ankle, knee, and hip joints of a user.