Compact and lightweight, the Osprey Viper 5 hydration pack is ideal for trail running, mountain biking and fast-and-light day hiking. The Viper 5 has the carrying comfort and hydration capacity (2-Liter) needed for technical performance.
Unlike traditional hydration bladders, the Viper 5's 2-Liter Hydraulics reservoir has its own direct-welded "backpanel" that minimizes "barreling" by maintaining a more anatomical shape. Nestled within its own dedicated, externally-accessed compartment, the reservoir is locked securely in place, reducing the sloshing effect that many hydration pack users have come to accept as a necessary evil. An anti-microbial treatment prevents mold and bacteria from building up inside the reservoir.
A spacer mesh backpanel offers lightweight, ventilated support. The padded BioStretch harness and webbing hipbelt offer a secure fit that mirrors your movements during aerobic activities. An adjustable and elastic sternum strap further ensures a stable fit and its magnetic hose attachment strategically secures the hydration system's bite valve.
The Viper 5 has a streamlined storage capacity of 305 cubic inches. A front zippered pocket serves as an additional storage option and a stuff-it pocket on the front of the pack keeps extra layers close at hand. An integrated LidLock clip securely stows a helmet without reducing the Viper 5's storage capacity. A safety light attachment point and reflective graphics provide a measure of safety.
The Osprey Viper 5 hydration pack is available in your choice of color options.
- AirScape backpanel with perforated foam for cushion and ventilation
- Ventilated harness is light and breathable
- Hydration sleeve with direct access zip for fast loading
- LidLock clip quickly secures helmet
- Front shove-it pocket
- Main compartment with sleeves for pumps
- Top zip access sunglass pocket with protective embossed fabric
- Blinker light attachment patch and reflective graphics for safety
- Magnetic sternum buckle for quick access to bite valve
- 2L Hydraulics Reservoir included
Best Use Hiking, Cycling Access Front Panel Loading Warranty Lifetime Volume 305 cu in Type Hydration Pack Sternum Strap Yes; Adjustable Position Material 210D Polyester Triple Diamond Ripstop and 600D Polyester Item Weight 1 lb 0 oz Hydration Compatible 2L Hydration System Included Fits Torso One Size Dimensions 20" x 9" x 6"