Designed with input from professionals in the special operations community from around the world, the 511 H.R.T. is the most functional and innovative boot on the market. Waterproof Sympatex® lining of these 511 boots allows the foot to breathe as well as stay dry, while the Armortex® Kevlar® side panels give the boot stability and support. The carbon based outsole design incorporates the latest technology in slip and oil resistant rubber with minimal squeaking. All of these materials in the H.R.T. boot come together to comprise the 511 Shock Mitigation System™. 511 boots are like no other. They are setting a new and higher standard for tactical footwear. Imported.