Review on M.U.L.E. Mountain Biking Hydration Backpack by CamelBak - Convenient Refilling Hydration Pack - Magnetic Tube Trap - 100 oz. by William Stevenson

I already had a LOBO (3L water / 6L cargo) and wanted something with more space for longer mountain bike rides, so I got it I also opted for the MULE (3L water / 9L cargo). It's good packaging, CamelBak quality, has multiple compartments and the container packs and unpacks relatively easily. To avoid leakage, put the cap on the opening of the tank, press it lightly and turn it counterclockwise (!) first. Then when you feel a click, turn it clockwise and tighten it. The quick release hose clamp is very convenient and works well. The ventilation seems to work better than other backpacks I've had, but it doesn't work wonders, you'll still end up with a sweaty back. It claims 9 liters of cargo space, which seems a bit optimistic, although in the end the MULE has enough space to carry everything you need for a day trip.