Get the perfect combination of comfort and protection from the Shock Doctor(R) Core Supporter with BioFlex(TM) Cup. Constructed with a supportive, form fitting, four-way stretch material, the comfort waistband holds the supporter and cup in place during activity. A vented bio-shape offers breathable mesh for maximum airflow. The BioFlex(TM) cup gives you an integrated gel perimeter pad for unrestricted movement. Features: Flexible four-way stretch material in briefs Internal mesh cup panel keeps cup secure and allows for air-flow Comfort waistband for a secure fit BioFlex(TM) cup Includes 1 BioFlex(TM) cup and 1 core supporter Shock Doctor SHOCK DOCTOR MEN'S SIZING CHART: Measure the circumference of your waist Waist (in.) 30-32 = S; L CUP INCLUDED Waist (in.) 32-34 = M; L CUP INCLUDED Waist (in.) 34-36 = L; L CUP INCLUDED Waist (in.) 36-39 = XL; L CUP INCLUDED Waist (in.) 39-43 = XXL; L CUP INCLUDED Waist (in.) 43-46 = XXXL; L CUP INCLUDED