UNIVERSAL FIT: Compatible with clips, hooks, and loops to fit a wide range of vests and packs including Osprey, CamelBak, Gregory, Mystrey Ranch and 5.11 Tactical. HEAVY DUTY: Heavyweight TPU, welded seams and an innovative design make for an abrasion-resistant, field-ready reservoir. COMPACT & COMFORTABLE: Dual Shape-Loc baffles hold a trim profile for improved maneuverability in tight spaces, takes up minimal volume in packs and pulls weight closer to the body for better balance. COMET BITE VALVE & DUST COVER: Lightweight, self-sealing valve delivers a high flow and can be locked and unlocked with one hand. INSULATED TUBE: Insulated HydraFusion drink tube keeps water cool when the weather is warm.