When you’re squeezing in a quick ride after work, Osprey’s Viper 3 Litre Hydration Pack is the perfect size. The suspension is designed for moving light and fast: A foam framesheet spreads weight across a ventilated mesh backpanel for lightweight comfort. The BioStretch™ shoulder harness provides a contoured fit and the webbing hipbelt is removable to shave ounces. If you end up carrying extra weight, top compression straps lend extra load stability.
Access gear in the main compartment via a zippered front panel. You can slip small items into the harness pocket or stash a layer in the front fabric shove-it pocket for quick access.
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 LidLock™ helmet attachment system.
Features and Specifications
- A dedicated hydration compartment with direct zip access for easy loading includes a Hydraulics™ LT 2.5 liter reservoir with magnetic sternum strap bite valve attachment.
- Ultralight with minimal body contact for a fit that feels like it’s not there.
- Upper Side Compression Straps - Dual upper side compression straps help stabilize the load
- Front Shove-It Pocket - Front panel shove-it pocket with zippered organization pocket helps gear accessible and systematized
- LidLock™ Helmet Attachment - An elasticized LidLock™ helmet attachment system provides storage for your helmet
- Blinker Light Attachment - The blinker light attachment strap found near the base of the front panel of the pack allows for quick light attachment for high visibility in the dark
- Hydration Compartment - Hydration sleeve with direct access zip offers fast loading. Hydraulics™ 2.5L LT reservoir included
- Harness Pocket - Stretch mesh harness pocket provides easy access to energy snacks and other quickly needed items
- Atilon foam framesheet allows dynamic body movement while it spreads load across the entire back panel
- Mesh covered ridged foam allows maximum ventilation while keeping the load close to the body
- Mesh covered die cut foam provides an active and contouring fit and ventilation
- Removable 20mm webbing ride stabilizing hipbelt
- Fabric: Main: 210 Denier Poly Honey Comb; Accent and Bottom: 420 HD Packcloth
- 2.5 Lt Hydration Reservoir included
- Weight: 420 grams + 180 grams for the 2.5 Litre Lt Reservoir
- Volume: 3 Litres
- Dimensions: 42cm High x 20 cm wide x 17 cm deep