Upper: Black Full Grain Oil-Tanned Leather Construction: Goodyear Welt Outsole: WORK ONE® Dual Density Polyurethane Comfort Sole with 90° Heel Lining: Comfort Weave Insole: Total Cushion Arch Support System with Memory Foam, Flex Notches, and Fatigue Mat Midsole: Rubber Green Stripe Shank: Fiberglass Protective Type: ASTM F 2413-05 M/I/75/C/75/Mt/75, Electrical Hazard, AEROMET™