Left and right asymmetrical, non-metallic carbon toes offer unobtrusive fit andare 15% lighter than steel KEEN.DRY waterproof, breathable membrane seals out moisture from the inside 100% non-metallic construction for easily passing through metal detectors inhighly-secured areas Non-mutilating upper reduces the chance of marking or scratching surfaces Oil- and slip-resistant non-marking rubber outsole Electrical hazard (EH) or Electric Shock Resistant (ESR) footwear helps provide asecondary source of protection in case of accidental outsole contact with liveelectrical circuits 90° heel (1/2'' Height) helps provide secure footing on ladders, scaffolding, orloose, uneven surfaces Full-grain Barnyard Resistant leather helps resist the damaging effects of jobsitechemicals like oleic acid, urea, sodium chloride, and ammonium hydroxide