This new safety toe work boot from Red Wing combines heavy-duty leather with the functionality of a waterproof membrane and the durability of a welted SuperSole®, all while providing protection for your feet. Model: 4215 Full Grain, Waterproof Mahogany Voyageur Leather ComfortForce® footbed RW dry waterproof membrane Non-metallic (fiberglass) shank SuperSole® welt construction (Sole is sewn to the boot and can be replaced) Safety Rating: ASTM F2413-11, M, I/75, C/75, EH (Electrical Hazard-rated) The Horizon™ DL SuperSole® is rated "Best" for use with oil/gas, "Better" for use with chemicals and again abrasions; and "Good" for slip resistance and for use with heat