Osprey Seral 4 Hydration Waistpack – Low-Profile Lumbar Mountain Biking Pack with 1.5L Reservoir

Low-Profile Performance for the Trail

The Osprey Seral 4 is designed for mountain bikers who want the freedom of an off-the-back carry without losing the convenience of integrated hydration. This slim lumbar pack features a dedicated 1.5L reservoir and an updated high-strength magnetic coupling system, ensuring your hose stays secure even on the roughest technical descents.

Stability Meets Comfort

Engineered with an angled hipbelt and the ErgoPull cross-body strap system, the Seral 4 pulls the load into your lumbar area for maximum stability. The AirScape backpanel uses extra-thick ridged foam and center air channels to provide ventilation while keeping the pack snug against your body. Constructed with eco-friendly, bluesign-approved recycled materials, it is as durable as it is sustainable.

• 1.5L Hydraulics Reservoir Included: Features a magnetic bite valve for easy one-handed access.
• Ride Stability: Airmesh wrap hipbelt and compression straps prevent bounce on technical terrain.
• Sustainable Build: Constructed with PFC-free recycled high-tenacity nylon for years of trail use.
• Smart Organization: Main zippered compartment includes tool organization and internal pockets for CO2 and snacks.

Specifications:
Style: Lumbar Hydration Waistpack
Capacity: 4 Liters
Hydration: 1.5L Hydraulics Reservoir Included