The Loop Bag was designed to be used as a rear bag. It allows the shooter to make quick and reliable adjustments to elevations simply by squeezing the bag or by releasing grip tension. Unique shape allows for three different levels of elevation idea for more conventional hunting stocks as well as modern skeletal stocks. Made from 1000D Cordura Nylon. Bags are triple stitched for strength. Filled with polypellets, which do not absorb water. Approximate size: 9″x5″x1.5″. Approximate weight: 1 lb.