ALLOY TOE: Left and right asymmetrical aluminum alloy safety toes weigh 35% less than steel toes and offer a sleeker appearance; The Sparta 2 Low Alloy Toe industrial work shoes meet or exceed ASTM F2412 and F2413 M I/75 C/75 SD 35 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;TRADESWOMEN TESTED: Built on a specific womenâ€s foot form that is wider than the industry norm for improved fit & comfort; The sizes listed are womenâ€s and fit true to size and moisture-wicking textile lining transports moisture away from feet;SUPPORT & UNDERFOOT PROTECTION: ESD footwear is constructed to reduce excess static electricity by conducting the charge from the body to the ground; The TPU shank is used for midfoot and underfoot support that provides structure, stability, and comfort;COMFORT: Features KEEN.ReGEN technology; a lightweight, compression-resisting midsole providing 50% more energy return than standard EVA foam making safety footwear more comfortable; Includes removable PU insole