100% Waterproof - BLOOM eco-friendly algae-based EVA footbed that helps clean polluted water habitats - Constructed with 7mm Neo-Tech waterproof insulation - BioGrip outsole combines ASTM standard slip and chemical-resistance - DuraFresh natural bio-technology activates to fight odors - Bogs Max-Wick evaporates sweat to keep feet dry - Comfort rated to -40AdegF/-40AdegC