For riders looking for a low-profile lumbar pack with integrated hydration, 4-liter Seral is the perfect trail companion. This slim waist pack features the next-gen 1.5-liter Hydraulics reservoir with high-strength magnetic coupling for improved hose management even in rough terrain and enough storage capacity for ride essentials, such as a spare tube, CO2 and multi-tool and, of course, snacks.

Large zippered main compartment with reservoir sleeve

Included Osprey Hydraulics 1.5 L Lumbar Reservoir with strong magnetic hipbelt bite valve attachment.

Main compartment tool organization and internal zippered pocket

Blinker light attachment with reflective graphic (light not included)