Osprey Seral 4 Bike Hydration Lumbar Pack Color:Raven Black reducing to approximately the size

reducing to approximately the size of a fist to stash in your jersey pocket with ease

The narrow head width and compact trigger allow the cams to be placed deep in small pockets

With its inside/outside (I/O) dual-thread design

Gas NOT included

these skins offer the best grip

Osprey Seral 4 Bike Hydration Lumbar Pack Color:Raven Black reducing to approximately the sizeHydrate fast and ride light with this compact, stable lumbar style bike pack featuring an integrated low profile Hydraulics 1. 5L LS Reservoir. A magnetic attachment secures the bite valve to the hipbelt, while a bike specific airmesh wrap hipbelt and close to body AirScape backpanel deliver breathable, bounce free comfort. Vertical straps hold a chin guard or extra layer for added versatility. Features Dual zip access to main compartment with glove