The Savage Gear Polar Boot is made from extremely tough 100 per cent Oxford polyester shell fabric with a water-repellent finish. The boot is insulated with one layer of 100 per cent sponge and has an artificial warm berber fleece of 70 per cent polyester and 30 per cent acrylic as an inner lining. Features a removable, breathable, foam innersole for extra comfort. Ultralight, 100 per cent waterproof EVA mid-sole and 100 per cent strong rubber out sole with special grip pattern.