Osprey Viper 9 Hydration Pack

Stay hydrated with the Osprey Viper 9 Backpack. This little guy is the perfect size for day hikes, chair lifts, or mountain bike rides. Keep all your necessities organized, and keep your body happy with the included 3L Hydraulics™ reservoir. Wherever you take the Osprey Viper 9 Backpack, you can be sure you will have plenty to drink.