This invention describes shoe inserts made from a special waterproof, breathable material called ePTFE. The ePTFE material is shaped and joined to itself to form the insert, allowing it to conform to various shoe sizes and shapes. This design aims to eliminate the need for traditional waterproof seam tape and multiple insert sizes.
Why it matters: The claims emphasize seamless, integrally joined ePTFE. Automated textile bonding and precise material shaping have advanced since 2014, potentially simplifying complex waterproof structures.
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