Waterproof and breathable footwear resistant to post-treatment

This invention describes a waterproof and breathable shoe. It achieves this by carefully attaching a special membrane inside the shoe to both the insole and the outer material using a specific type of glue. This glue is designed to resist high-temperature manufacturing steps, such as steaming during the shaping process, ensuring the waterproof seal remains effective.

Why it matters: Advances in adhesive chemistry since 2021 may offer more robust or cost-effective anchoring adhesives specifically designed to withstand high-temperature footwear manufacturing processes like steaming. This could make the claimed durable waterproof seal easier to achieve.

Status: ExpiredProtection ended and was never renewed
How hard to build: SpecializedSpecific adhesive, membrane, footwear manufacturing process.

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