Under Armour Pro Senior Chest Protector - Boys' Grade School Stay protected behind the plate with the Under Armour Chest Protector. This lightweight, comfortable chest protector is made with plastic inserts in the throat, sternum and shoulders to disperse impact. Low rebound foam deadens ball hits. Adjust this bad boy to fit your body and your needs with the fully adjustable shoulder cap, removable tail and customizable straps and harness. Stay safe, but stay cool at the same time with the breathable mesh backing and ventilation ports on the back. Fight the funk with AEGISŪ Microbe Shield that kills unwanted bacteria and odors. To determine the proper size, measure vertically from the top of the sternum to the the waistline. This Senior League-level protector is 15.5" long and will fit most athletes aged 12-16.