Developed side by side with the United States Marine Corps, the RAT (Rugged All Terrain) earned its name among elite warfighters as being the only proven US MC rugged all terrain boot available. Precisely crafted with a highly durable nubuc leather, a tear resistant 1000 Denier nylon, an abrasion resistant polyurethane enforced heel and toe cap and an advanced Vibram 360 Dri Ice outsole, the RAT embodies Danner's commitment to crafting higher standards. 100% waterproof and breathable. Steel safety toe meets or exceeds ASTM standard F2413-11 I/75 C/75 EH. Electrical hazard (EH) footwear is manufactured with non-conductive electrical shock resistant soles and heels.