Upper: Black Walnut Full Grain Oil-Tanned Leather. Construction: Goodyear Storm Welt. Insole: Removable Polyurethane ''Ultimate SD'' Footbed. Midsole: Rubber Green Stripe. Outsole: Dual-Density Polyurethane Comfort Sole with 90 degree Heel. Special Features: ASTM F2413-11 M I/75/C/75 Steel Toe. Static Dissipative, Meets ASTM 2412-11 Test Requirements. Reinforce Stitch ''Ball to Ball'' on Outsole.