Design: 100% waterproof injected rubber shell keeps little feet dry Bungee closure for a secure, kid-friendly fit 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 and comfortable Ultra-cozy fleece lining Durability & Traction: Rugged rubber outsole provides reliable traction Additional Details: DuraFresh natural bio-technology activates to fight odors Comfort rated to -22degF/-30degC