This boot features full-grain leather, a soft mesh lining, and waterproof bootie construction. It also has the Durango X-Pand System, a hidden gore expansion for a universal fit and easy on/off. The Durango X-Treme Comfort Footbed offers memory foam for long-lasting comfort, and a fiberglass shank for stability. Its midsole is dual-density with a firmer heel for extra stability and a soft front-part for flexibility & comfort. The external shank provides stability, and the outsole has multi-durometer rubber with high abrasion outer lugs for durability & softer mid lugs for flexibility, slip, oil, and heat resistance. It has a single-row sole stitch and a 1 1/2" rocker heel. Meets ASTM F2413 standards for protective toe, electrical hazard & slip, oil, and heat resistance.