Carl Tampa wrote a review of CamelBak MULE Hydration Pack on April 24, 2007
I ride about 10hr a week all off road. Park Services only supplies water on our trail at one place which is only cause it meets up with a paved trail. So hydration is key. I normally need more water than I can carry but the M.U.L.E. lets me go non-stop. Plus I can carry my chain lube, Multi-Tool, air pump and patch kit, and food. even has a place to attach my keys so that I don't lose them. The mp3 holder has enough room for an iPod and a cell phone (don't want your cell to get wet when you fall into a creek or get caught in a downpour.) Can't say enough about it. Just get one and find out yourself.