Full-grain waterproof leather Left and right asymmetrical, non-metallic carbon-fiber toes offer unobtrusive fit and are 15% lighter than steel KEEN.DRY waterproof, breathable membrane Oil- and slip-resistant non-marking rubber outsole Electrical hazard (EH) or Electric Shock Resistant (ESR) Meets ASTM F2412-17 and F2413-17 M I/75 C/75 EH standards Meets ASTM F1677-96 Mark II non-slip testing standards Meets ASTM F2913-17 SATRA non-slip testing standards Midsole meets ASTM D471-06 903# oil and isooctane chemical resistance standards 3/4 Goodyear welt construction for enhanced durability and flexibility under extreme working conditions KEEN LUFTcell dual-density PU midsole, infused with air for weightless comfort Heat resistant, rubber outsole rated up to 572° F / 300° C 90° heel (5/8" Height) provides stability and helps "catch or lock" the foot in place Contoured heel lock helps "lock" is anatomically shaped, "locking" it in place and reducing heel slip Contoured heel guard protects against bumps and scrapes, plus normal wear and tear Dual purpose metal lace hooks Nylon shank for midfoot support Removable metatomical PU footbed Cleansport NXT™ Technology for natural odor protectionVendor Style Number: KEEN Utility Men's Philadelphia Waterproof 6" Carbon Fiber Toe Work Boot