Under Armour Pro Chest Protector - Men's This game will never be the same ... Take a step forward with the Under Armour Pro Chest Protector. Concentrate on being the field general with this pro level chest protector, featuring memory foam cushioning to reduce rebound or blocked balls. The construction has large ventilation ports and slimmed side panels for lighter weight and better mobility. A DeltaFlex™ harnessing system offers exceptional fit and freedom of movement while the Aegis Microbe Shield® provides odor and bacterial protection. To determine the proper size, measure vertically from the top of the sternum, down to the waistline. Sz: 16.5''.