This invention describes a multi-layered lining for shoes and boots designed to keep feet dry and comfortable. It uses an inner material to move moisture away from the foot, followed by a nonwoven fabric combined with a breathable foam, and a layer for warmth. The outermost layer is a waterproof material with a film to block water from getting in.
Why it matters: Since 2004, material science has advanced, offering more efficient moisture-transfer fabrics and lighter, more durable waterproof films. This could enable a significantly improved performance-to-cost ratio for such a layered footwear system.
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