Premium Raptek microfiber upper. Alloy safety toe meets ASTM F2412-11, ASTM F2413-11 I/75 and C/75 impact and compression safety standards. Cement construction for flexibility and reduced break-in time. Mesh lining with antimicrobial treatment for odor control. Single-density polyurethane midsole meets ASTM F2412-11, ASTM F2413-11 and ASTM F2892-11 Electrical Hazard safety standards. Fiberglass shank for structural support. Anti-fatigue comfort system designed with shock-absorbing, geometrical technology for energy return. Dual-density polyurethane traction outsole are oil resistant per SATRA TM63, heat resistant up to 248 degrees Fahrenheit and abrasion resistant. Lace-up closure for secure fit. Padded tongue and collar for added comfort.