Osprey Seral 4

Bite me. Riders looking for a low-profile lumbar pack with integrated hydration need look no further than the Seral 4. This sleek hip pack features a 1.5-liter reservoir with our updated high-strength magnetic coupling system for improved tube management, even in rugged terrain.

The Seral 4 offers ample storage for essentials like a spare tube, CO2, a multitool, and of course, snacks. Made from high-quality, bluesign®-certified, recycled high-tenacity nylon with a PFC-free DWR coating.

Lumbar carry. For riders who need hydration or storage while riding but prefer the carry style and minimalism of lumbar packs.

Ride stability. Our bike-specific, angled hip belt and compression straps provide stability and comfort by keeping the pack close to the body. This is achieved through a breathable Airmesh hip belt that wraps around the hip joint, Osprey's ErgoPull cross strap closure system that pulls the pack into the lumbar area, and side compression straps that keep the load close to the body, offering the most comfortable, secure, and stable carrying experience.

Includes reservoir. A dedicated hydration compartment accommodates a 1.5-liter lumbar reservoir included for short to medium rides and compresses for a stable carry, while the tube magnet attaches to the bite valve for easy access while riding.

Sustainable materials. Made from PFC-free, recycled, bluesign®-certified nylon; a sustainable construction that is robust and durable to withstand years of riding.