Design: 100% waterproof gold certified leather upper Gore panels and heel pull loop for easy on and off In-Shoe Comfort: BOGS Max-Wick evaporates sweat to keep feet dry Rebound cushioning provides all-day comfort and energy return BLOOM eco-friendly, algae-based EVA footbed that helps clean polluted water habitats. Additional Details: DuraFresh natural bio-technology activates to fight odors Comfort rated to -4Fdeg/-20degC