Shellback heel support. Nylon shank for midfoot support. Electrical hazard (EH) or Electric Shock Resistant (ESR) footwear. Water resistant leather. Removable metatomical PU footbed. Keen Luftcell: Air-infused, PU midsole for weightless comfort. Oil- and slip-resistant non-marking rubber outsole. Gently brush leather with a soft bristle brush or hand towel. Weight: 25.75oz / 730g.