Designed for superior comfort, support, and protection, the Shock Doctor Adult Core Supporter with BioFlex Cup does its job but never gets in the way. The Core Supporter is constructed from breathable, four-way stretch mesh for a perfect fit. Along with the comfort waistband you will never have to play with irritation. The Shock Doctor Adult BioFlex cup provided with the Core Supporter features a vented bio-shape designed to protect your most important areas. The BioFlex cup fits perfectly and provides unrestricted movement, airflow and comfort.