Off the back and leading the pack—our premium mountain bike lumbar includes a 1.5-liter reservoir and features designed to keep you in the saddle. Dual hip-belt pockets grant easy access to snacks, and a stretch mesh front pocket keeps kneepads, gloves, or a light jacket handy. Side compression and a women's-specific fit on the Raven 4 stabilize the pack from techy climbs to the jump line. Features: AirScape back panel with contouring lumbar wrap provides maximum stability Separate compartment with a removable tool roll keeps tools accessible and organized Large zippered main compartment with reservoir sleeve Included Osprey Hydraulics 1.5 L Lumbar Reservoir with strong magnetic hip-belt bite valve attachment and left or right tube management option Secure routing for reservoir hose behind the hip pocket for extra security Internal goggle pocket and pocket with key clip LidLock bike helmet attachment Dual zippered hipbelt pockets Stretch mesh front pocket for small kneepads, gloves or light jacket Dual side compression for stability Blinker light attachment Reflective graphics for safety