Throwback Style, Breakthrough Technology 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.Carbon-Fiber Toe | Heavy DutyLeft and right asymmetrical, non-metallic carbon-fiber toes offer unobtrusive fit and are 15% lighter than steelKEEN.DRY waterproof, breathable membraneOil- and slip-resistant non-marking rubber outsoleElectrical hazard (EH) rated - providing a secondary source of protection in case of accidental contact with live electrical circuitsFull-grain Waterproof Leather Upper - Barnyard ResistantKEEN Luftcell: Air-infused, PU midsole for weightless comfortContinuous Goodyear welt construction for enhanced durability under extreme working conditionsShellback heel supportLocking metal lace hooksRemovable, dual-density PolyAer PU footbed with aerated pillow-top cushioningMoisture-Wicking Textile LiningMeets ASTM F1677-96 MARK II Non-Slip Testing StandardsMeets ASTM F2412-17 and F2413-17 M I/75 C/75 EH StandardsMeets ASTM F2913-17 SATRA Non-Slip Testing StandardsWeight: 34.5 oz / 978.1 gCalf Circumference: 1.5 in / 3.8 cmCollar Height: 6.0 in / 15.2 cm Keen Men's Cincinnati 6" Waterproof Boot (Carbon-Fiber Toe), 1023222 | redwoodtradingpost