Osprey Seral Biking Waist Pack with Hydraulics Reservoir
The Osprey Seral is a compact, stable hydration waist pack built for mountain bikers and cyclists who want quick access to water without a full backpack. Designed by Osprey, this unisex pack includes a 1.5-liter Hydraulics LS Lumbar reservoir, a bike-specific airmesh wrap hipbelt, and an AirScape backpanel to keep you cool and comfortable. It's perfect for short, gear-light rides where you need just the essentials.
Integrated 1.5L Hydraulics Reservoir for On-the-Go Hydration
The included reservoir is tailored for a lumbar fit, with a magnetic bite valve attachment and smart hose routing that keeps the tube within easy reach while riding. No more fumbling for your drink.
Rider-Focused Organization
The main compartment features glove-friendly zipper pulls and internal zippered organization to keep your phone, keys, and tools secure and accessible. Tuckaway front straps can hold a chin guard or extra layer.
Stable, Body-Hugging Fit
The angled, bike-specific airmesh hipbelt uses Osprey's crossbody ErgoPull system to pull the pack snug against your hips, reducing bounce on rough terrain. Side compression straps stabilize contents.
Breathable AirScape Backpanel
The mesh-covered, extra-thick ridged foam backpanel features a center airflow channel to keep your back cool during climbs. Made with 50% recycled EVA foam for eco-friendliness.
One Size, Unisex Fit
Designed to fit a broad range of body shapes and sizes, the Seral adjusts to your waist for a secure, comfortable ride.
Dimensions and Weight
Pack volume: Not specified. Dimensions: 6.7 x 11.4 x 5.9 inches (17 x 29 x 15 cm). Weight: 0.74 lb (335 g) without reservoir; reservoir weighs 0.28 lb (129 g).
