A Lightweight, extreme cold weather multi purpose boot. Built for snow professionals, hard core winter adventurers, and outdoorsmen. This boot features a waterproof, full grain leather/Cordura® nylon upper, synthetic toe and heel overlays, 1000 grams of Thermolite™ Insulation, Cambrelle® lining, internal pockets for hot packs, built in Thermashield™ frost plug to keep out the cold , nylon shank and a Vibram® rubber outsole with minimal loading lug tread pattern. Comfort rated to -100°F / -74°C (depending of activity level) Imported