Stay warm and dry with the Kamik Greenbay 4 as you trudge through the rain, snow and sludge in style and comfort! Weatherproof durable 600D nylon upper. Waterproof and flexible synthetic rubber shell. Kamik's weatherproof construction offers protection for when winter weather attacks. Water repellant uppers combined with waterproof shells help keep snow and slush out. Snow collar and adjustable midfoot hook-and-loop strap help create a comfortable and personalized fit. Moisture-wicking lining. Removable 8mm Thermal Guard Liner. Made by Kamik, this liner is designed to provide superior warmth and moisture management. PRIME outsole maximizes traction. Temperature rated: -40°F/-40°C. Made in the USA of imported materials. Measurements: Weight: 1 lb 7 oz Circumference: 17 in Shaft: 11 in Product measurements were taken using size 7, width B - Medium. Please note that measurements may vary by size. Weight of footwear is based on a single item, not a pair.