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Upper side compression straps stabilize the load
The blinker light attachment found near the base of the front panel of the pack allows for Quick light attachment for high visibility in the dark
An elasticized lid lock helmet attachment system provides storage for your helmet
Osprey's Viper 9 is designed for cyclists who like to push the limits-packing full day rides into half that time and bringing just enough gear to make it home. Whatever you choose to carry, the foam frame sheet spreads your load across a ventilated mesh back panel for all-day comfort. The stretch shoulder harness provides a contoured fit and the webbing hip belt is removable to shave ounces. If you end up carrying extra weight, top compression straps lend extra load stability. Access your gear in the main compartment via the zippered front panel. You can slip small items into the dual side mesh or harness pockets or stash a layer in the front fabric Shove-It pocket for quick access. There's even a scratch-free slash pocket for your shades. Bike-friendly features include a hydraulics lt 2.5 liter reservoir with magnetic bite valve retention, internal bike pump storage loops, and osprey's innovative lid lock helmet attachment system.
Osprey Packs Viper 9 Hydration Pack B014EBJPME