Impact testing determines the amount of protection to the toe under various foot pounds of force. Compression testing determines the amount of static pressure a steel/composite toe cap can withstand. Our boots are I75/C75 Footwear is built with nail-free construction to help insulate you from the ground to slow down conduction, but is not intended to be primary protection against electric shock. Leather footwear must be dry. Our electrical hazard boots meet and exceed ASTM electrical hazard standards. >High-performance lining >EVA midsole >Full-grain leather >Steel Toe >Notched welt >Oil and slip-resistant PU outsole >ASTM F2413 protective toe classification >ASTM F2413 electrical hazard standard >Oil-resistant bumper guard >Steel shank for added arch support >4 Inches in height >GoodyearA(R) welt construction