Men’s Greenbay 4 Kamik snow boot, size 11 Waterproof 600 denier nylon upper Waterproof, lightweight synthetic RubberHe shell 8mm Thermal Guard removable liner made from 100 percent recycled content locks in heat and wicks moisture Adjustable snow collar with bungee lace lock to keep snow and cold air out Adjustable midfoot hook-and-loop strap provides a custom fit PRIME lightweight synthetic RubberHe outsole supplies traction Height: 15’’ Weight: 3.6 lbs. per pair Comfort rating: Down to -40°F