Design: 100% waterproof to help keep feet dry and comfortable Breathable mesh-sandwich fabric lining improves air circulation bio-DEWIX(TM) anti-microbial footbed insert topcover with NZYM(TM) for odor control and moisture management In-Shoe Comfort: Dual density comfort footbed with memory foam for long lasting cushioning Lightweight midsole for all-day support Durability & Traction: Lugged rubber outsole for durable traction