A descending downhiller's best friend. You'll notice that the profile of this particular hydration system is different from most in that the weight is held down low in the small of the back. The idea behind this is to keep the center of gravity low and close to the waist giving you more stability on those sweet bumpy and sketchy descents.
There is also a small pouch big enough to fit in a few essential goodies but overall this is a slim streamlined lightweight kind of pack not designed to carry huge amounts of gear.
Other features include: