Designed with gender specific anatomic construction for a better fit and increased comfort, the PerformXTM Short helps you perform at your peak and beat your personal best. CoolmaxAR fabric wicks sweat and dries quickly for cooling. LycraAR spandex provides muscle support. Support WebTM provides targeted support to lower back, core, knee joints and surrounding muscles. Reinforced elastic waist with interior drawstring for secure fit. Interior key pocket. Flat seams reduce chafing. Reflective logos increase visibility in low light conditions.