Osprey Seral 4L Biking Waist Pack with Hydraulics Reservoir

Look no further than the Seral 4 if you're a rider searching for a low-profile lumbar pack with integrated hydration. This sleek waistpack is equipped with a 1.5-liter bladder that features our updated high-strength magnetic coupling for improved hose management, even in rough terrain. It boasts ample storage space for ride essentials such as a spare tube, CO2, multi-tool, and snacks. Our bike-specific, angled hipbelt and compression straps ensure stability and comfort by keeping the pack close to your body.

The breathable airmesh wrap hipbelt contours over the hipbone, while Osprey's ErgoPull cross-body waist strap closure system pulls the pack into the lumbar region, and side compression straps bring the load close to your body, providing a comfortable, secure, and stable carry. The Seral 4 is designed for riders who need hydration or gear storage while riding but prefer the off-the-back carry and minimalism of lumbar packs.

Constructed with PFC-free recycled bluesign®-approved nylon, this pack is sustainable and durable, built to last through years of riding. The extra thick ridged foam with a center air channel offers excellent ventilation, while the Airmesh wrap hipbelt provides stability and breathability. The ErgoPull waist strap closure system ensures a proper snug and stable fit, and the AirScape backpanel with contouring lumbar wrap delivers maximum stability.

A dedicated compartment stores the included 1.5 L lumbar reservoir and compresses for stable carry, with the hose magnet attaching to the bite valve for easy access while riding. The main compartment features tool organization and an internal zippered pocket. With a total volume of 4L, the Seral 4 is the perfect combination of hydration, storage, comfort, and durability for riders.

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