The Caldwell Tack Driver Shooting Rest Bag features the innovative Caldwell non-stretching, non-sagging polyester, plus an added non-slip, non-marring material on the top and bottom that combine to offer a stable and secure shooting rest. This shooting bag is solid yet portable using the integral shoulder strap, and can be used just about anywhere, even on vehicle hoods. The long, self-tightening contact surfaces grip your rifle or shotgun like a vise and aid in reducing muzzle jump and felt recoil. The bag is filled with brass cleaning media and weighs 11.8 lbs. Dimensions: 11x8x8.5inSpecifications and Features: Self-tightening surface grips your rifle and reduces felt recoil Non-marring, non-slip surface will not harm your rifle's finish Supports almost any rifle or shotgun type Portable design Both for permanent and portable use