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

Color

Pediment Gray