COMPOSITE TOE: Left and right asymmetrical, non-metallic carbon-fiber toes, a composite material, offer an unobtrusive fit and are 15% lighter than steel; The Vista Energy+ work shoes meet or exceed ASTM F2412 and F2413 M I/75 and C/75 Standards TRACTION: Oil- and slip-resistant, non-marking, rubber outsoles are used for improved traction that meet or exceed ASTM F1677 MARK II and ASTM F2913 SATRA Non-Slip Testing Standards; Non-marking uppers reduce the chance of marking surfaces WATERPROOF: KEEN.DRY is a waterproof, breathable membrane liner that lets vapor out without letting water in to keep your feet dry and comfortable; The Vista Energy+ has a mesh liner that integrates with the waterproof membrane SUPPORT & PROTECTION: Featuring a nylon shank, used for midfoot support, and torsion stability; Made with full-grain waterproof leather and meets ASTM D471 #903 standards for oil and isooctane chemical resistance COMFORT: Made with KEEN.ReGEN a lightweight, compression-resisting midsole providing 50% more energy return than standard EVA foam for lasting support and comfort