Steel shankWelt constructionASTM F2413 protective toe classificationASTM F2413 electrical hazard standard1" heelFull Wrapped Foam Cushion InsolePolyurethane Lite-Lug OutsoleSoft Tumbled Leather UppersStitched Rubber Bumper GuardWorkshoe Last6 Inches in heightImpact 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/C75Footwear 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.