This heavy-duty wedge introduces lightweight comfort into a classic style. Carbon-fiber toes and air-infused midsole offer unbeatable comfort while an EH-rated rubber outsole provides better slip-resistance. 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) rated - providing a secondary source of protection in case of accidental contact with live electrical circuits Full-grain Waterproof Leather Upper - Barnyard Resistant KEEN Luftcell: Air-infused, PU midsole for weightless comfort Continuous Goodyear welt construction for enhanced durability under extreme working conditions Shellback heel support Locking metal lace hooks Removable, dual-density PolyAer PU footbed with aerated pillow-top cushioning. Toe Type: Carbon-Fiber Toe Duty Type: Heavy Duty Water Proof Certified Slip Resistant (Mark II) Weight: 34.5 oz / 978.1 g Calf Circumference: 1.5 in 3.8 cm Collar Height: 6.0 in 15.2 cm 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