Shock Doctor Men's & Boy's Core Compression Short with Bio-Flex Cup Synthetic Core Compression Short with X-Pocket Cup Retention System; Positions the lower third of the cup in a more natural position between the legs for a close, more comfortable fit during a wider range of motion when running, skating, or crouching Constructed with moisture wicking four-way stretch fabric that moves with your body while eliminating sweat Dual mesh cup, flatlock seams and comfort-fit waistband for maximum ventilation and comfort Bio-Flex Cup has a vented bio-shaped design to shield areas where protection is most crucial. The body of this core protective gear forms flawlessly to your athletic frame providing unrestricted movement, airflow and comfort.