Authentic Sports Authority Heart-Guard Compression Athletic Undershirt (Baseball, Football, Soccer, Softball&hellip;) Heart-Guard Protective Body Sports Authletic Undershirt. High Performance Compression Shirt with Heart-Gaurd sewn-in. Comfortable & Tough/High Density Polyethylene 6x6 dome absorbs impact energy away from the heart. A must for all Sports: Baseball, Football, Soccer, Softball, Hockey, Basketball Available in 2 Colors (Grey or White) and 6 Youth Sizes & 5 Adult Sizes.