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 Low work shoes meet or exceed ASTM F2412 and F2413 F I/75 and C/75 StandardsTRACTION: 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 surfacesFIT & CONSTRUCTION: Built on a specific women’s foot form that is wider than the industry norm for improved fit & comfort; The sizes listed are women’s and fit true to size; Made with KONNECTFIT heel capture system for a locked-in feelSUPPORT: Made with KEEN.ReGEN a lightweight, compression-resisting midsole providing 50% more energy return than standard EVA foam; Nylon shank for midfoot support and stability, and 100% non-metallic construction for passing through metal detectorsCOMFORT: Mesh liner provides breathability to help keep feet cool in warm environments, Removable metatomical PU footbed for long lasting support; CleansportNXT provides natural odor protection using probiotics