KEEN.DRY waterproof, breathable membrane seals out moisture from the inside, Heat-resistant rubber outsole rated up to 572F/300C, Made in the USA with globally sourced materials, Oil- and slip-resistant non-marking rubber outsole, Contoured heel lock is anatomically shaped to reduce heel slip, Nylon shank for midfoot support, Removable metatomical insole for comfort and support, Direct attach PU midsole for long-lasting comfort, Electrical hazard (EH) or Electric Shock Resistant (ESR) footwear helps provide a secondary source of protection in case of accidental outsole contact with live electrical circuits, Left and right asymmetrical steel toes offer proven protection and unobtrusive fit,