We invented Rattler Bags in 1985, and now we have made them better and easier to use! Belt Hung System For One-Handed Rattling Convenience. Bone Core Polymer Rods For Added Realism, and They are Waterproof. Super Elastic Camo Self-Silencing Sleeve. Flexes Smoothly During Use Then Snaps Tight To Silence Contents When You Stop. Open Fabric Weave Gets The Sound Out Better And Louder.