BRIAN'S OPT1K FLX Leg Pads feature X-static air-knit through the leg channel to provide anti-microbial properties to eliminate odor and bacteria. The Core construction is a re-engineered chassis that gives two core options. The FLX Core is designed with a 80° taper and curve shaped chassis. Smart Strap X system allows for a single connection point providing more secure and open strapping options. Opti-slide inner gusset is a re-designed inner gusset that features a bindingless design. Primo material and hardened sliding edge to create the ultimate slide.