Design: 100% waterproof Constructed with 7mm Neo-Tech waterproof insulation Heel lock prevents heel slip and ensures optimal fit Reflective temperature rating mark on heel Easy on handles 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 Durability & Traction: Flexible outsole promotes healthy foot development Additional Details: DuraFresh natural bio-technology activates to fight odors Comfort rated to -30degF/-34degC