The Evo Shield Shooting System reduces felt recoil from a jolt to a push. The Evo Shield pad comes to you in a sealed foil pouch. When removed from the pouch, and placed in the pocket of the included athletic performance shirt, this thin pad "air cures" to fit your body and reduce felt recoil by more than 90%. The air curing process takes only 10 minutes and also allows the butt of your gun to form a permanent set as the pad molds to fit your shoulder in your normal shooting position. This custom-formed anchor point allows you to have a consistent gun set and allows you to concentrate on our shot and not on recoil. The included performance shirt is 82/18 polyester/spandex. Available for right-hand and left-hand shooters in sizes Small(32"-36"), Medium(36"-40"), Large(40"-44"), XL(44"-48"), XXL(48"=52").