With 4 liters of carrying capacity, the Osprey Seral 4 Lumbar Pack is the optimal size for the vast majority of mountain bike rides. Equipped with a 1.5L hydration reservoir, a big zippered main compartment with internal organization for bike tools, and Osprey’s beloved AirScape lumbar backpanel for ergonomic comfort and ventilation, the Seral 4 Lumbar Pack is just what you need to focus more on the trail and less on combating sweaty back syndrome.
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Material
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   Main–        bluesign® approved 600D recycled PET polyester, PFC-free DWR
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   Accent–        bluesign® approved 400D high-tenacity nylon, PFC-free DWR
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   Bottom–        bluesign® approved 400D recycled high-tenacity nylon, PFC-free DWR
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Dimensions
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   7.5″ H x 12.5″ W x 4.5″ D
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Pockets
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   Large Zippered Main Compartment with Reservoir Sleeve
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   Main Compartment Tool Organization
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   Internal Zippered Pocket
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Features
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   Blinker Light Attachment with Reflective Graphic
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   Magnetic Hipbelt Bite Valve Attachment
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   Included Osprey Hydraulics 1.5L Lumbar Reservoir by Hydrapak
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   AirScape Lumbar Backpanel–        Extra thick ridged foam with center air channel for excellent ventilation.
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   Airmesh Wrap Hipbelt–        Airmesh wrap hipbelt with zippered fabric pockets provide stability and breathability.
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   ErgoPull Waist Strap Closure System–        Allows for proper snug and stable fit.
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- Â Â Â Material: Â Â Â Recycled Nylon, Recycled Polyester
-    Biking Type:    Mountain                                    MountainMountain bikes are built for tackling rough terrain with frames made of durable materials like aluminum or carbon fiber, ensuring stability and maneuverability. They feature suspension to absorb impacts from rocks, roots, and drops, providing a smoother ride.           Â
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