Core Compression Short with Bioflex Cup are a compression short with a ventilated inside cup pocket, comfort fit waistband and Velcro tabs to secure socks in place. They are constructed with supportive four-way stretch fabric that wicks moisture away from the skin and the X-Fit Retention system that integrates a wraparound external X-Fit supporter sewn directly into the garment, providing a closer, more comfortable fit than any standard athletic short on the market. The Bioflex cup is unique, vented body with integrated gel perimeter pad for unrestricted movement and improved comfort.