Design: 100% waterproof protection Constructed with 5mm Neo-Tech waterproof insulation to keep your feet warm and dry Boot shaft easily adjusts to fit different size calves Made with seamless construction for reliable protection 30% lighter and more durable than other boots In-Shoe Comfort: Rebound cushioning provides all-day comfort and energy return BLOOM eco-friendly, algae-based EVA footbed that helps clean polluted water habitats Flex Width insole system adapts to foot width for a comfortable, custom fit Durability & Traction: BioGrip slip-resistant outsole for reliable grip Heel Lock prevents heel slip and ensures optimal fit Additional Details: Comfort rated to -58°F/-50°C DuraFresh natural bio-technology activates to fight odors