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 Mid work boots 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-mutilating uppers reduce the chance of marking surfaces SUPPORT & UNDERFOOT PROTECTION: ESD footwear is constructed to reduce excess static electricity by conducting the charge from the body to the ground; A nylon shank used for midfoot support, and torsion stability SUPPORT: These boots are made with KONNECTFIT heel-capture system for a locked-in feel, and 100% non-metallic construction for passing through metal detectors with ease COMFORT: Made with KEEN.ReGEN a lightweight, compression-resisting midsole providing 50% more energy return than standard foam for lasting support and comfort