ASTM F2413-11 I/75 C/75 Protective Toe Classification. Compliant with ASTM F2413-11 Electrical Hazard standards. Carbon fiber protective toe cap. Expansion Fit Seam for easy on/off. Long Range heel, Long Range square toe. Long Range X outsole exclusive patented system of ten highly engineered components for peak performance. Stabili-Shank provides total arch support and edge-to-edge lateral stability. Guaranteed Rocky Waterproof construction.