This premium waterproof boot offers up to 3X more flexibility in the forefoot, plus an air-infused midsole for the ultimate in support + comfort. American Built Carbon-Fiber Toe KEEN.DRY KEEN.BELLOWS FLEX LUFTCELL EH-Rated Oil- And Slip-Resistant KEEN.FUSION WEIGHT27.55oz / 781g DUTY TYPE Medium FEATURES American built using the finest materials from around the world Left and right asymmetrical, non-metallic carbon-fiber toes offer unobtrusive fit and are 15% lighter than steel KEEN.DRY waterproof, breathable membrane Contoured heel lock helps lock is anatomically shaped, locking it in place and reducing heel slip TPU shank for midfoot support 90° heel (5/8 Height) provides stability and helps catch or lock the foot in place Electrical hazard (EH) or Electric Shock Resistant (ESR) footwear provides a secondary source of protection in case accidentally coming into contact with live electrical circuits Environmentally preferred premium leather from LWG-Certified Tannery PFC-Free, durable water repellent MATERIALS Waterproof leather upper Locking metal lace hooks Removable metatomical PU footbed KEEN Luftcell: Air-infused, PU midsole for weightless comfort Oil- and slip-resistant non-marking rubber outsole CARE Gently brush leather with a soft bristle brush or hand towel to remove loose dirt and debris. Tough stains may require a leather cleaner. SAFETY FEATURES Meets ASTM F3445-21 and F2413-18 M I/75 C/75 EH standards Meets ASTM F1677-96 Mark II non-slip testing standards Outsole and midsole meets ASTM D471-06 903# oil and isooctane chemical resistance standards Keen Men's Portland 6" WTPF CF Steel Toe Boot