XO's HeartShield helps protect young athletes from Commotio Cordis, a rare, but often fatal condition resulting from a hard projectile striking the heart center in-between beats. The HeartShield features a compression vest with patent-pending "EDS", a 3-point energy deflector system that covers the heart. "EDS" uses a unique "Raised Tripod" design which channels impact energy to the 3 anchor points, away from or "around the critical heart" area, greatly reducing injury potential. Tripod shape also allows for complete arm motion with zero restriction - it's the most effective and comfortable heart protection vest you can buy. The HeartShield can be worn by both boys and girls ages 5-13.