Carhartts 11-inch bison work boot/safety toe stands up to the toughest terrain. Constructed with abrasion-resistant Cordura nylon and oil-tanned leather, its dual-density PU (polyurethane) outsole is oil, chemical and slip resistant. A waterproof membrane helps to ensure dryness, and an OrthoLite insole adds comfort. It's built Carhartt strong with direct-attached welt construction with a molded TPU (thermoplastic polyurethane) heel counter. Featuring a safety toe, it's ASTM 2413-05, EH rated.