The largest volume in the Viper series, the Viper 13 has a front stretch mesh pocket, interior dividersin shove-it pocket that creates three seperate compartments and a lower compression strap to pull weight close to the body.
With these extra features the Viper 13 is the pack best suited for 3 hours plus of riding with the added capacity for extra food, layers and tools. This hydration pack is also ideal for longer trail runs and day hikes.
Buy Osprey Accessories from Chain Reaction Cycles,the World's Largest Online Bike Store.
If you're not completely satisfied with an item you may return it within 12 months of purchase. We'll give you a full refund if the item hasn't been used or fitted.More information on returns