The PAST original Mag Shield is designed to provide unparalleled recoil protection while sighting in your rifle, benchrest shooting, or participating in many other shooting activities. The size and shape of the Mag Shield creates the perfect combination of function and comfort. It can be worn on the left or right shoulder and attaches with an easily adjustable side closure for a secure fit. The leather on the front secures the gun in place, while the leather on the back of the shield provides a comfortable feel and prevents the shield from sliding around on your shoulder. The shield's 1/2" thick, energy-absorbing pad provides excellent protection for calibers up to 300 Winchester Magnum. The PAST product line is based on a patented foam material that dramatically reduces the felt recoil of rifles, shotguns, and handguns. This foam pad, worn over the shoulder, absorbs and spreads the recoil impulse, significantly reducing the recoil felt by the shooter. Other styles of recoil protection tend to bounce into your shoulder, which can create an unstable feeling while offering inadequate protection. The PAST recoil protection system allows a shooter to concentrate on hitting the target instead of fearing the punishment of recoil. Concentration helps to create good shooting habits, and more importantly, prevents developing bad ones.