KEEN.DRY waterproof, breathable membrane seals out moisture from the inside, Heat-resistant KEEN.ToughSole outsole rated up to 250F/121C, Full 360 Goodyear welt construction provides support for heavy-duty jobs or uneven surfaces, Nylon shank for midfoot support, PFAS-free, durable water repellent repels water just as well as forever chemicals without harming the planet, KEEN Luftcell midsole infused with 100,000 microscopic air bubbles per cubic centimeter for all-day comfort, 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, Full-grain barnyard resistant waterproof leather helps resist the damaging effects of oleic acid, urea, sodium chloride, and ammonium hydroxide, Removable, dual-density PolyAer insole with aerated pillow-top cushioning for comfort,