Built for 3+ hours of riding and offering plenty of organization options, the Osprey Viper 13 hydration pack totes your gear plus 3 liters of water for your extended rides.

• Hydration system features a 100 fl. oz. reservoir that conforms to back's shape even when full, resulting in a precise, stable and comfortable fit
• Rigid spine/handle stabilizes the reservoir, making it easy to slide it into its dedicated compartment; large mouth makes filling/cleaning easy
• Hydration reservoir pocket has zippered access that extends onto shoulder strap, letting you remove, refill and replace reservoir and drink tube quickly and with minimal fuss
• Low-profile padded mesh back panel and mesh shoulder straps offer next-to-body comfort; sternum strap has a magnetic attachment for keeping bite valve accessible
• Large zippered main pocket with tool organization sleeves and a mesh pocket is ideal for carrying pumps, bike tools and tubes
• Front zippered pocket has additional mesh pockets for more organizational options; key clip secures keys
• Stretch mesh front and side pockets work great for stashing extra gear or water bottles for quick, easy access
• Quick-access top zippered pocket is lined with a soft, easy-to-clean heat-embossed fabric that helps keep sunglasses or other fragile items from getting scratched
• Quickly attach a helmet to the Viper 13 with the LidLock helmet clip; bungee on the exterior of the pack allows easy adjustment of the LidLock feature
• Shove-it pocket can be cinched down to secure bulky items like a jacket
• Top and bottom side compression straps help stabilize pack and contents; removable webbing waistbelt helps stabilize pack
• Reflective trim increases visibility in low light
• Osprey Viper 13 hydration pack sports a BPA- and PVC-free reservoir that does not retain tastes or odors and features an antimicrobial treatment that deters bacterial growth