The Arctic Pro is one of the warmest neoprene boots on the market. Perfect for the hunter or outdoor worker in cold climates. Featuring a 8mm neoprene waterproof bootie and fleece lining for the standard in warmth and protective support. The 2mm foam under the footbed assures warmth in low temperatures or when standing on ice. A topline binding keeps the snow and cold out, and warmth inside. 100% Waterproof, 100% MUCKPROOF 2mm Thermal foam under the footbed for extra warmth 8mm Neoprene Bootie for Comfort and Performance Bob-Tracker all purpose, multi terrain outsole...semi spherical lugs provide traction in loose surfaces without being gummed up by debris Comfort Topline EVA Midsole for Added Comfort Warm Lining: Soft, Insulation, Light-weight, Performance Materials for Warmth and Comfort