X0 Youth Sports Heart Shield %90 Polyester / %10 Lycra Made in USA Advanced Protection - Unlike foam protectors, X0 HeartShield uses a hard polycarbonate shield (PC8 technology) encased in soft elastomer that redirects impact energy. Play With Confidence - Born from the latest research, X0's patented raised 3-point shield helps protect the critical sternum area from direct impacts. X0 Superior Comfort - X0 HeartShield's unique tripod shape won't interfere with arm motion - the poly/lycra vest stays cool & comfortable all game long. X0 HeartShield is worn under the uniform, it can be worn by both Boys and Girls ages 6-13 X0 HeartShield difference - PC8 Technology and patented rasied tripod design - Superior to Foam Padding