This combat boot is designed for quick use in the field, with a convenient side zipper for a quick on and off. This boot is waterproof to keep feet comfortable in inclement weather. It's built with the technology and design of athletic footwear with a Mountain Trail rubber outsole, EVA cushion midsole and strobel construction. Made from a smooth leather and Cordura upper with a moisture-wicking Tailex lining, the Reebok Rapid Response boots offer the ultimate comfort in hot environments. They also offer a removable F2 dual-density polyurethane cushion insert with TPU stabilizer and shock eliminator heel cushion for customized comfort.