|G-Form Compression Shirt literally acts like armor. Absorbing over 90% of impact forces — time after time — while giving you full athletic mobility. This low-profile Compression Shirt is your own personal shield. Its padding is designed to protect and support your shoulders, sternum and ribs with G-Forms Reactive Protection Technology : a composite blend of Poron XRD material and proprietary G-Form technology. Its the protective force you need to buffer the body blows that otherwise lead to major injuries.