X-FIT CUP RETENTION SYSTEM integrates a wraparound external supporter for unparalleled comfort, fit and protection. Versatile Compression Short constructed with supportive four-way stretch anti-microbial fabric that wicks moisture away from the skin. Includes interlocking flat seams, a ventilated inside cup pocket and comfort fit waistband. Bioflex Cup has a vented bio-shape body with integrated gel perimeter pad fro unrestricted movement and improved comfort.