Off the back and leading the pack—Osprey's premium mountain bike lumbar includes a 1.5-liter reservoir and features designed to keep you in the saddle. Dual hipbelt pockets on the Raptor 4 grant easy access to snacks, and a stretch mesh front pocket keeps kneepads, gloves or a light jacket handy. Side compression and a hip-wrapping backpanel stabilize the pack from techy climbs to the jump line.

• AirScape backpanel with contouring lumbar wrap for maximum stability
• Separate compartment with removable tool roll and large zippered main compartment with reservoir sleeve
• Included 1.5 L Lumbar Reservoir with magnetic hipbelt bite valve and secure hose routing
• Internal goggle pocket, key clip, and LidLock bike helmet attachment
• Dual zippered hipbelt pockets, stretch mesh front pocket, dual side compression, blinker light attachment, and reflective graphics for safety