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 hipbelt 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 backpanel 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 hipbelt 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 Ride Stability Bike-specific airmesh wrap hipbelt creates ultimate stability for the roughest rides. Trailside Organization Ride confidently and with peace of mind, benefiting from features like internal organization and intuitive hydration sleeve access. Reservoir Included Quick access to the Osprey Hydraulics™ LT 1.5 L reservoir keeps you hydrated for the miles ahead. Hydraulics Quick Connect Kit sold separately. bluesign® PRODUCT This product meets bluesign® PRODUCT requirements, which means materials and components have been selected that adhere to rigorous environmental and social criteria during production. AirScape™ Lumbar Backpanel Mesh-covered, 50% recycled EVA foam on an Atilon back panel framesheet allows dynamic body movement and maximum ventilation while keeping the load close to the body Hipbelt Spacer mesh hipbelt provides stability and breathability while the ErgoPull waist strap closure system allows for a proper, snug fit LOAD RANGE N/A - N/A lbs. O/S VOLUME 244 IN 3 / 4 L DIMENSIONS 7.9H X 16.1W X 6.3D IN. WEIGHT 1.08 LBS. FABRIC MAIN bluesign® APPROVED, 100% recycled 210D dobby nylon, DWR treatment made without PFAS BOTTOM bluesign® APPROVED, 100% recycled 420D nylon, DWR treatment made without PFAS WARNING: This product can expose you to chemicals including dimethylformamide, which is known to the State of California to cause cancer. For more information, go to oehha.ca.gov/proposition-65/about-proposition-65