82% Polyester, 18% Spandex Imported Impact Protection - Unique press-formed foam padding protects against sudden impact and minor injuries from balls, pitches and hard hits to the sternum, heart, and chest area. Padded Compression Shirt for Boys - Mesh fabric across shoulders back and sides for superior breathability. Quick dry technology makes your body cool and dry. Perfect for Baseball, Football, Softball, T Ball, Lacrosse, Paintball, Catchers, Rugby, Goalies, Pitching and Batting. The Padded Sternum Shirt can keep your child safe when they are competing! Wash with cold water and tumble dry low. Warning: This product is designed to minimize injury from minor impacts to the sternum and chest area. It is not guaranteed to reduce the risk of Commotio Cordis, a rare but sometimes fatal injury arising from sudden impact to the heart. Size Based on Chest Size. X-Small= 23-25", Small=25-26.5", Medium= 26.5-29.5", Large= 29.5-33", X-Large= 33-36". We offer you 30 Days No-Hassle-Return Policy, Lifetime Warranty for Replacement and Lifelong Technical After-Sales Service. This chest protector shirt adopts unique press-formed foam padding protects against sudden impact and minor injuries from balls, pitches and hard hits to the sternum, ribs, heart, and chest area. Mesh fabric across shoulders back and sides for superior breathability. Quick dry technology makes your body cool and dry. It is perfect for Baseball, Football, Softball, T Ball, Lacrosse, Paintball, Catchers, Rugby, Goalies, Pitching and Batting. The Padded Sternum Shirt can keep your child safe when they are competing!