evo.com | Osprey Hydration Packs > Built for riders and trail runners who want hydration without the bulk, the Osprey Raptor 4 features an AirScape(TM) Lumbar Backpanel that actually fits right and a 1.5L reservoir to keep you sipping mile after mile. At just 4L, it's lean but loaded-think tool-roll organizer, helmet-carry straps, and hipbelt pockets with enough space for the essentials. Osprey Hydraulics(R) LT 1.5L Reservoir Included An Osprey Hydraulics(R) LT 1.5L or 2.5L reservoir keeps you hydrated all day long and stores in an external hydration compartment to protect pack contents from accidental spills. Main bluesign(TM) approved 100% recycled 210D bird dobby nylon, DWR treatments made without PFAS 7.9H X 16.1W X 6.3D IN Separate Compartment with A Removable Tool Roll AirScape(TM) Lumbar Backpanel Mesh-covered, 50% recycled EVA foam on an Atilon back panel frame sheet allows dynamic body movement and maximum ventilation while keeping the load close to the body. | Osprey Raptor 4 Hydration Waist Pack 2026 in Black | Nylon