With SmartFlex? padding positioned atop the sternum, our Pro Sternum Shirt provides the added protection you need whether you're facing a lively fastball or taking a short hop off the chest. The sleeveless compression shirt and fully flexible, low-profile SmartFlex? padding provide superior protection while allowing full range of motion so it won't interfere with your play. Features Body-mapped SmartFlex? pads with reactive protection technology and impact-absorbing XRD? Protection. Molecules in the foam slightly repel each other, making the material soft and flexible. Upon impact the molecules instantly bind together to absorb and redistribute the energy. After impact, the molecules return to their original flexible state. Material: 82% Nylon, 18% Spandex. Color: Black. SN01020