Forged for the forge, so you can always keep your feet in all kinds of heat. Dip-tested in 1273 degree molten aluminum in multiple smelters. If that's not enough for you, nothing is. Footwear Type: 10" Heat Resistant Work Boot with Poron® XRD® Internal Met Guard Toe Type: Composite Upper Material: Full Grain Leather Color: Dark Brown Lining: Dri-Lex® Zig Zag Moisture Wicking Lining Insole: BootBed™ Dual Layered Memory Foam Removable Footbed Outsole: Vibram® Alpha TC4+ Heat Resistant Rubber Outsole Special Features: Dip Test Approved, Goodyear Welt Construction, Genuine Leather Welt, Kevlar® Stitching, Poron® XRD® Internal Met Guard, Scuff Tough High Abrasion Toe Features: ASTM F2413, Electrical Hazard Protection, Poron® XRD® Internal Metatarsal Guard, Composite Toe, Scuff Tough, Kevlar® Stitching, BootBed™ Footbed, Vibram® Outsole - Dip Test Approved: No molten penetration at 1273° F in molten metal bath. - Vibram® Alpha TC4+: Takes 4 digit surface heat so you don't have to. Tough against hot surfaces. - Poron® XRD® Internal Met Guard: Extreme impact protection. The harder it's hit, the harder it gets. - Soft and flexible when you're working, but strong and rigid when you need it to be. - Dual Layer Memory Foam Footbed: Lets your feet breathe easy, with anti- odor technology and memory foam comfort. Tough against odor. Tough against pain