The Viper 13 provides enough carryingcapacityTo bring allThe necessary gear on a full-day mountain biking,trail running or day hiking adventure.The included 3 liter HydraForm reservoir and magnetic bite valve attachment keep dehydration at bay all day. HydraForm 3L reservoir 180 deg On-Off Pivot Bite Valve BPA and PVC free LidLock DesignedTo fit a mansTorsoTail light attachment Shoulder strap pocket Front mesh packet Stash pocket Spacer Mesh backpanel Reflective graphics 13L of storage (800 cu i
I was a loyal Camelbak user since 1994 but I got disgusted with the bladders being a bear to open. I'll never go back. This pack is my dream pack. The bladder is soooo easy to remove, open, fill, close and effortlessly drop back into the back. Camelbak owners do not know what this is like. Everything about this pack is designed smart and it is rugged. There are outer pockets to access things quickly and enough space for any epic ride. The straps and back are padded just right. This model is different than most of their others because the small waist straps are removable. I like only using a sternum chest strap and the pack has so much storage that you don't need the waist strap compartments that most of the other models have. Too many other cool little features too list here. Suffice it to say that Osprey is hungrier Than Camelbak and willing to work harder. The MSRP price is well worth it and REI has them on sale at least once a year.