ANSI/ASTM I75 & C75 Approved. Premium Waterproof Full-Grain Tumbled Leather. Waterproof Membrane for Extreme Abrasion Resistance and Dry Feet. 600 Grams of Efficient Flame Laminated Thermolite Insulation for Warmth without Bulk. Molded Rubber Toe Protector for Increased Abrasion Resistance and Durability. Composite Safety Toe Shaped On TiTAN Last For Non-Metallic Protection and Roomy Fit. Combination Three-Quarter Goodyear Welt/Cement Heel Construction. Rigid External Heel Cap for Lateral Stability. Ever-Guard Leather Heel for Increased Durability. Padded Top Collar for Comfort. Constructed on TiTAN Last For Superior Fit. Fiberglass Shank for Structural Support. Slip, Oil & Abrasion Resistant Dual Density Cold Temperature Thermal Plastic Urethane Outsole. Outsole Tested For Volume Swell Using EN345 TMP ASTM Fuel A 7 Diesel ISO 1817 Liquid F For 22 Hours And ASTP IRM903 & Fuel B For 46 Hours.