Durability, safety, and comfort were considered when making the Rocky 8 in. Alphaforce Composite Toe Work Boots. To create a durably tough exterior, the composite toe work boots use full-grain leather and 1000 denier nylon (superior strength). A side zipper allows you to easily get these work boots on and off, and they're covered with a Velcro strap. Guaranteed Rocky Waterproof construction for durability Airport Footbed provides support and cushioning Oil, slip-resistant and non-marking RigiTrac molded EVA and rubber outsole 1 year limited warranty Work boots with side zipper for easy on and off Full-grain leather upper for a unique look ASTM F2413 protective toe classification; ASTM F2413 electrical hazard standard Shaft height measures 8 in.