Men's Muck Arctic Sport Grip High is a warm winter boot from Muck Boot. Material function -40 to +4\nFleece lining, and stretchfit shaft provides warmth and 5mm CR flex-foam with four layers of stretch lining provides a\nlight and comfortable boot. 100% waterproof, MS1 molded outsole and durable for maximum protection and stability,\ndouble reinforcements at ankle and heel, 2mm foam underlay for additional insulation from below. EVA molded midsole. Muck Boot Men's Muck Arctic Sport Grip High Black | Buy Muck Boot Men's Muck Arctic Sport Grip High Black here | Outnorth