Design: 100% waterproof bioDEWIX™ antimicrobial footbed insert topcover with NZYM™ for odor control and moisture management Upper features a lock-down zipper closure system Natural scree collar In-Shoe Comfort: Breathable mesh lining Dual density insole for all day comfort EVA midsole for lightweight comfort and shock absorption Durability & Traction: Lugged rubber outsole for durable traction