These men's Sorel 1964 Pac quarry/dove winter boots can keep you going amidst the biting cold. Comprising durable nylon upper, these waterproof boots have feature lace-up closure, secure round toe, detachable 9 mm washable recycled felt inner boot, supportive 2.5 mm bonded felt frost plug midsole and long-lasting rubber outsole. With a -40 C cold rating, these boots ensure impressive warmth.