Bend, crawl, squat, kneel, and work below your knees up-to 3x easier with KEEN.BELLOWS FLEX technology. 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 Electrical hazard (EH) or Electric Shock Resistant (ESR) footwear provides a secondary source of protection incase accidentally coming into contact with live electrical circuits Heat resistant, rubber outsole rated up to 572° F / 3° C 90° heel (5/8" Height) provides stability and helps "catch or lock" the foot in place Nylon shank for midfoot support KEEN.BELLOWS FLEX technology allows footwear to bend and flex up-to 3x easier LuftCore air-inject core for additional heel cushioning and shock absorption Direct attach PU construction creates a strong bond between the upper and outsole without the use of glue or cement Material Leather Upper Oil- and slip-resistant non-marking rubber outsole KEEN Luftcell: Air-infused, PU midsole for weightless comfort Moisture-wicking textile lining Removable, dual-density PolyAer PU footbed with aerated pillow-top cushioning Technologies KEEN.DRY A proprietary waterproof, breathable membrane that lets vapor out without letting water in. KEEN.BELLOWS FLEX Built-in flex that makes every step feel easier, bending where other boots crack and weaken over time. Electrical Hazard Provides a secondary source of protection when outsole accidentally comes in contact with live electrical circuits, helping to reduce the potential of electric shock. Weight & Dimensions Weight:29.8 oz / 844.8 g Calf Circumference:10.0 in / 25.4 cm Collar Height:6.0 in / 15.2 cm 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 Safety Rating: Meets ASTM F1677-96 MARK II Non-Slip Testing Standards Meets ASTM F2412-17 and F2413-17 M I/75 C/75 EH Standards Meets ASTM F2913-17 SATRA Non-Slip Testing Standards Meets ASTM F2412-18 and F2413-18 M I/75 C/75 EH standards Midsole meets ASTM D471-06 903# oil and isooctane chemical resistance standards Toe Type:Carbon-Fiber Toe Duty Type:Medium Duty Water Proof Certified Slip Resistant (Mark II) Keen Men's Troy KBF WTPF Carbon Fiber Toe Boot