The new universsal Bio Flex Bow Sling from Gibbs Archery is made out of a very strong flexible rubber material. It does not slide so it holds onto your shoulder snug. It is adjustable for everyone. It works by attaching to your bow riser or snaps to your cams. It has quick connect S-Carabiner clips for fast and easy on and off. Great for any long walk on hunts or 3D-ranges or climbing into loc-ons. Just carry your bow hand free.