Footwear article including circular knit structures

This is a shoe upper made from a single piece of fabric created using circular knitting, like a tube. This knit tube is then folded or arranged so that one part forms the outer surface of the shoe and another part forms the inner lining, creating a double-layered structure. A midsole can be placed between these two layers.

Why it matters: The core industrial circular knitting technology for footwear has not fundamentally changed since 2019. The primary challenge remains the specialized equipment and expertise needed to produce this complex, integrated double-layer structure.

Status: Not in forceListed as no longer active. The specific reason is not in the record we hold.
How hard to build: SpecializedIndustrial circular knitting machine, footwear design expertise

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