Osprey Seral 4 Lumbar Hydration Pack Size:4L RevoWrap™ construction envelops the foot

RevoWrap™ construction envelops the foot with a single piece upper

The Torsion Deck design reduces stress on your joints while creating a natural stride even through steep

X version when massive snow loads and high alpine exposure are a normal part of your adventures

The dual secondary points are optimized for technical precision

Osprey Seral 4 Lumbar Hydration Pack Size:4L RevoWrap™ construction envelops the footRiders looking for a low profile lumbar pack with integrated hydration need look no further than the Seral 4. This slim waistpack features a 1. 5 liter bladder with our updated high strength magnetic coupling for improved hose management even in rough terrain. The Seral 4 has enough storage capacity for ride essentials, such as a spare tube, CO2 and multi tool and, of course, snacks. Constructed with high quality bluesign approved recycled high