The Osprey Seral 4 is a lightweight and versatile mountain bike hydration waist pack designed for cyclists who need hands-free hydration on the go. Featuring an AirScape backpanel with a contouring lumbar wrap, this pack provides maximum stability and comfort during rides.

Equipped with a 1.5L lumbar reservoir and a magnetic bite valve, the Seral 4 ensures easy access to hydration while maintaining a snug fit with its ErgoPull waist strap closure system.

• Large zippered main compartment with tool organization and internal zippered pocket
• Extra-thick ridged foam with center air channel for excellent ventilation
• Airmesh wrap hipbelt with zippered fabric pockets for stability and breathability
• Blinker light attachment with reflective graphic for enhanced visibility