Design: 100% waterproof Constructed with 3mm Neo-Tech waterproof insulation Wider entry for easy on Gore panels and heel pull loop for easy on/off In-Shoe Comfort: BLOOM eco-friendly, algae-based EVA footbed that helps clean polluted water habitats BOGS Max-Wick evaporates sweat to keep feet dry Additional Details: DuraFresh natural bio-technology activates to fight odors Comfort rated to -22°F/-30°F