Upper Black Walnut Oil-Tanned Leather. Construction Goodyear Storm Welt. Lining Comfort Weave. Insole Removable Dual Density Ultimate Shock Absorption Footbed on Poron 4000 Comfort Cushion. OutsoleThorogood Dual Density Polyurethane Comfort Sole with 90° Heel. Special Features: ASTM F2413-11 M/I/75/C/75, COMPOSITE SAFETY TOE, Unlined Shaft, Security Stitch Ball to Ball on Outsole, EH Rated, Tested For and Meets CAN/CSA-Z195 18,000 Volts Electric Shock Resistance Standard.