ANSI/ASTM I75 and C75 Approved. Internal Metguard - Flexible I-MET, Technology. I-MET is a Revolutionary Concept in Internal Metatarsal Protection. The Polymer Compound used in the I-MET² Absorbs and Deflects. Impact to the Instep of the Foot. Like the Original I-MET, I-MET² is an Internal, Invisible, Metatarsal Guard That's Completely Integrated with the Protective Toe Cap. Full-Grain Oil Tanned Leather. Goodyear Storm Welt Construction. Dri-Lex Lining. Removable Polyurethane Footbed on Poron 4000 Comfort Cushion. Rubber Midsole, Composite Shank. Slip, Oil, Heat Resisting Vibram ALPHA+ Sole. Kevlar Stitching on Upper, Kevlar Goodyear Welt Stitching. Electrical Hazard Approved.