Incredible protection and comfort in a brief-style undergarment. Supportive construction with stretch cotton/poly fabric material. Superior protection from BioFlex Cup, shielding and transferring shock and impacts of up to 100 mph away from the body. This youth brief is designed with moisture wicking four-way stretch fabric that moves with your body while eliminating sweat. The internal mesh cup panel secures the cup and increases ventilation to improve cooling. The Shock Doctor BioFlex Cup, a vented bio-shape device designed to shield areas where protection is most crucial. The body of this core protective cup forms flawlessly to your athletic frame, providing unrestricted movement, airflow and comfort. - Secure and comfortable fit. - Mesh cup panel for maximum ventilation.