(LaCrosse Footwear) 18" neoprene rubber boot is 100% waterproof, made of ozone-resistant rubber for lightweight comfort. 800 gm of Thinsulate Ultra for warmth with fleece lining for moisture management. Sport Chassis outsole system cradles foot for all-day walking comfort and provides stability on uneven terrain. Double-reinforced toe and heel. EVA midsole and footbed with fiberglass shank for arch support. Back gusset with camloc buckle for bulky clothing or larger calves.