CW-X Performx Tights - Women's The CW-X PerformX Tight helps keep everything in correct alignment for optimum balance, efficiency and power by providing support for the IT band, hip flexors and quads as well as good stabilization of the knees, calfs and achilles. The patented CW-X Support Web™ acts as a suspension system for the quadriceps, increasing power at the push phase of the running motion. The gentle targeted compression of the CW-X Support Web™ increases circulation, minimizing lactic acid buildup and reducing muscle soreness, making PerformX tights ideal recovery wear. UPF 40+ for UVA/UVB protection. Inner key pocket. 80% CoolMax® polyester/20% Lycra®. Imported.