Because the Buttstock Shell Holder with Flap from Uncle Mike?s is molded to fit individual stocks, it offers unmatched fit and comfort for the shooter?s hands and preserves reload momentum by acting as an intermediate "handle" between the stock and the body of the rifle. The superior construction and design of the Uncle Mike?s Butt Stock Shell Holder w/Plastic Flap is made from molded, heavy-duty, santoprene, not cheap, synthetic materials. The sling loop and adjustable shoulder pad also ensure the holder?s compact size and always stays in place for maximum comfort.