- Shock Doctor 201 BioFlex Cup- Vented bio-shape cup designed to shield areas where protection is most crucial. - ProvideS unrestricted movement, airflow, and comfort.BioFlex Protective Cup$9.99PriceSize*SelectColor*Quantity*Add to CartBuy NowProduct DetailsColor/Sizing: Black - Large (Age 15 and Older) Blue - Medium (Age 10 to 14) Red - Small (Ages 9 and Younger)