Goodyear® welt construction Unlined Quarters Internal padded collar High-performance lining EVA midsole Full-grain leather Steel shank Covered cushioned insole Oil Resistant bumper guard ASTM F2413 protective toe classification 6 Inches in height 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 using protective toe caps to help insulate you from the ground retard conduction, but is not intended to be primary protection against electric shock. Leather footwear must be dry. Our electrical hazard boots meets and exceeds ASTM F2413-05 electrical hazard standards.