Durability, safety, and comfort... all of these factors were considered when Rocky® constructed AlphaForce Zipper Composite Toe Duty Boots. To create a durably tough exterior, Rocky used full-grain leather and 1000 denier nylon (superior strength). A side zipper allows you to easily get these boots on and off. It's covered with a VELCRO® strap. While you're on duty, Alpha Force boots keep your feet safe. They have a composite toe that meets ASTM standards for impact and compression. The boots also meet ASTM F2413-11 Electrical Hazard standards. Although these Alpha Force duty boots have a tough exterior, the Air-Port™ cushion footbed supports and cushions your feet each time you take a step. It also circulates air within these boots. The RigiTrac™ outsole won't leave marks, and its slip-resistance helps you keep your balance while on duty. With all of these great features, this Rocky Alpha Force is the right duty boot for you!