Osprey Seral 4 with Reservoir

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. KEY ATTRIBUTES: a LUMBAR CARRY For riders who prefer off-the-back hydration carry and the minimalism provided by a lumbar pack. a RIDE STABILITY Our bike-specific, angled hipbelt and compression straps provide stability and comfort with a close-to-body fit. a RESERVOIR INCLUDED A dedicated hydration compartment stores an included Hydraulics(TM) LT 1.5 L Lumbar Reservoir for short to medium rides and compresses for stable carry. a SUSTAINABLE DESIGN + bluesignA(R) approved main body and bottom fabrics + GRS-certified 100% recycled main body and bottom fabrics + All DWR treatments made without PFAS + BPA-free reservoir FEATURES: a AirScape backpanel with contouring lumbar wrap provides maximum stability a Large zippered main compartment with reservoir sleeve a Included Osprey Hydraulics 1.5 L Lumbar a Reservoir with strong magnetic hipbelt bite valve attachment. a Main compartment tool organization and internal zippered pocket a Blinker light attachment with reflective graphic