Asymmetrical, non-metallic carbon-fiber toe, KEEN.DRY waterproof, breathable membrane and PFC-Free, durable water repellent, Nylon shank for midfoot support, 90 heel provides stability and helps catch or lock the foot in place, Electrical hazard (EH) or Electric Shock Resistant (ESR) footwear provides a secondary source of protection in case accidentally coming into contact with live electrical circuits, Full-grain barnyard resistant waterproof leather helps resist the damaging effects of oleic acid, urea, sodium chloride, and ammonium hydroxide, Removable, dual-density PolyAer PU footbed with aerated pillow-top cushioning, KEEN Luftcell: Air-infused, PU midsole for weightless comfort, Oil- and slip-resistant non-marking rubber outsole, Meets ASTM F3445-21 and F2413-18 M I/75 C/75 EH standards ; Meets ASTM F1677-96 Mark II non-slip testing standards ; Meets ASTM SATRA TM31 material abrasion testing standards ; Outsole and midsole meets ASTM D471-06 903# oil and isooctane chemical resistance standards,