Osprey Seral 4 Lumbar Pack
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For riders who require hydration or gear storage while riding, but prefer the off-the-back carry and minimalism provided by lumbar packs.
Our bike-specific, angled hipbelt and compression straps provide stability and comfort by keeping the pack close to your body. This is created by a breathable airmesh wrap hipbelt that contours over the hipbone, Osprey's ErgoPull cross-body waist strap closure system that pulls the pack into the lumbar and side compression straps that pull the load close to your body, providing the most comfortable, secure and stable carry.
A dedicated hydration compartment stores an included 1.5 L lumbar reservoir for short to medium rides and compresses for stable carry, while the hose magnet attaches to the bite valve for easy access while riding.
Constructed with PFC-free recycled bluesign®-approved nylon; a sustainable build that's tough and durable to endure years of riding.
AirScape backpanel with contouring lumbar wrap provides maximum stability
Included Osprey Hydraulics 1.5 L lumbar reservoir by Hydrapak
Magnetic hipbelt bite valve attachment
Large zippered main compartment with reservoir sleeve
Main compartment tool organization and internal zippered pocket
Blinker light attachment with reflective graphic