jason pittard wrote a review of CamelBak MULE Hydration Pack on April 12, 2007
just took the "mule" on a trip to shining rock NC. for a ten mile trek. having 3 liters to pull from was great. i used about 2 1/2 liters on the entire trip. the pack was lightweight and comfortable even when full. my back never hurt and i was plenty hydrated. great gear!