Hydrapak Hydrasleeve Water Bladder Hydration Pack Reservoir and Bite Valve Includes 100oz (3L) Reversible Reservoir II Hydration Drink System Simple Insulated Pouch has no shoulder straps Features a strap system designed to clip to backpacking packs, panniers, racks, tree branches, or any other creative place you can think about Features four side clips and one hanging strap Features 360deg insulation