Nubuck upper leather. Cambrelle lining with odor control. Removable open cell PU footbed. PU midsole. Timberland PRO abrasion, oil and slip resistant rubber outsole. Goodyear welt construction. Steel toe. EH.ASTM F2413-18 M/ I/ C EH compliant. The Pit Boss is everything a work boot should be: Safe, tough and really comfortable. First off, the steel toe construction meets ANSI safety standards and offers a roomier toe box than other boots. This means no foot pain even after long hours of hard work. You've also go an unsurpassed traction-grip for working on wet or slippery surfaces and electronic hazard protection to keep you safe from open circuits. On the comfort front, a removable sock liner proves blisters don't have to go hand-in-hand with hard work. And finally, these boots aren't anything if they aren't tough. Go ahead, just try and wear them out.