Full Grain Oil-Tanned Leather upper. Goodyear Storm Welt construction. Removable Polyurethane Footbed on Top of a Poron 4000 Comfort Cushion. Special Features: ASTM F2413-11 M I/75/C/75/Mt/75 Steel Toe, EH Rated. Tested For and Meets CAN/CSA-Z195 18,000 Volts Electrical Shock Resistance Standard. Patented I-MET Technology. Dual-Density Polyurethane Comfort Sole with 90 Heel outsole.