Amazon.com: KEEN Utility Vista Energy Shift ESD Black/Black 。Keen Men\'s 13D Utility Low Boot Shoe Vista Energy Carbon Toe almost new condition Features 100% non-metallic construction for easily passing through metal detectors in highly-secured areas Non-mutilating upper reduces the chance of marking or scratching surfaces KonnectFit heel-capture system for a locked-in feel Nylon shank for midfoot support PFAS-free, durable water repellent repels water just as well as forever chemicals without harming the planet Safety Features Left and right asymmetrical, non-metallic carbon toes offer unobtrusive fit and are 15% lighter than steel Meets ASTM F3445-21 and F2413-18 M I/75 C/75 EH standards Meets ASTM F1677-96 Mark II non-slip testing standards Midsole meets ASTM D471-06 903# oil and isooctane chemical resistance standards Materials KEEN.ReGEN lightweight, compression-resisting midsole providing up to 50% energy return with every step Oil- and slip-resistant non-marking rubber outsole 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 Removable metatomical insole for comfort and support