Off the back and leading the packOsprey’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.