An article of footwear includes a sole structure that has a heel portion with a rear, a lateral side, and a medial side. The article of footwear includes a heel extender that has a rear segment disposed at the rear of the heel portion, a lateral arm disposed at the lateral side of the heel portion, and a medial arm disposed at the medial side of the heel portion. The heel extender has a protuberance that establishes a rearmost extent of the article of footwear. The sole structure has a first hardness and the protuberance has a second hardness greater than the first hardness.

A shoe sole member formed by a foam includes cells having a certain size and being excellent in transparency in order to provide a shoe sole member being lightweight and excellent cushioning properties while having transparency.

The disclosed invention is directed to a footwear midsole configured as a rigid support comprising a cavity that includes a plurality of fluid-filled bladders. The bladders are formed from an elastomeric material that allows exclusive top-down compression of the midsole. Accordingly, the midsole provides a reactive opposed rebound force supplied by the elastomeric covering in response to compression. Advantageously, no outsole and/or insole is required, and the midsole can optionally be used alone in a shoe or other item of footwear.

An injection molding method includes providing a molding device including a first mold, a second mold over the first mold and a first mold cavity defined by the first mold and the second mold; injecting a first material into the first mold cavity; forming a first layer from the first material; replacing the second mold by a third mold, injecting a second material into a second mold cavity defined by the first mold and the third mold; and forming a second layer from the second material, wherein the second layer at least partially contacts the first layer. The first material is same as the second material.

A method for making an article of footwear includes placing a purified recombinant resilin composition in a mold with a cross-linking solution, incubating the recombinant resilin composition in the cross-linking solution to generate a solid resilin material, fabricating a cushioning element of the article of footwear including at least a portion of the solid resilin material, and assembling the cushioning element insole with at least an upper of the article of footwear.

A sole structure can include provisions for improving the cushioning characteristics and stability of an article of footwear. The sole structure may include multiple layers with specialized structural properties designed to integrate regions of stiffness with cushioning layers. In some cases, the sole structure can include at least two independent stability layers that differ in stiffness.

A midsole for sports shoes having a front isolation cavity, a side cavity, and a rear isolation cavity partially separating the recessed arch portion of the midsole from the rest of the midsole.

A method of making a midsole for an article of footwear includes forming a plurality of foam layers, arranging the plurality of foam layers in a mold to form the midsole, piercing the plurality of foam layers with pins, and introducing heat with the pins to bond the plurality of layers together.

A sole structure for an article of footwear includes a bladder having an inner chamber and a peripheral chamber completely surrounding the inner chamber. The inner chamber defines a first interior void having a tensile element received therein and providing the inner chamber with a constant thickness. The inner chamber may be arcuate and curve continuously from a first end of the bladder to a second end of the bladder. The peripheral chamber extends from and completely surrounds the inner chamber, and has a variable thickness that is greater than the constant thickness of the first inner chamber. The inner chamber and the peripheral chamber are in fluid communication with each other, and the peripheral chamber includes a plurality of deformation zones configured to deform to accommodate a pressure increase within the inner chamber.

A multi-purpose safety shoe, comprising an upper assembly provided, at the shoe toe, with a safety toe cap and a layered sole associated with the upper assembly. The layered sole comprises a lower layer adapted to come into contact with the ground, an intermediate layer associated with the upper assembly and the lower layer, respectively, and an upper layer. Below the upper layer and in the intermediate layer, exclusively at the rear zone of said multi-purpose safety shoe, is an antifatigue insert made of a material having a resilience greater than 25% and less than 35%. The intermediate layer is made of polyurethane having a resilience greater than 35% and less than 45%.