MEC Hydration Pack with 2 Litre Reservoir. Ideal for mountain biking, General cycling, or ultralight backpacking, adventure racing. Great shape, very little used. New tube and valve. No leaks - all good to go. Sternum strap and belt keep the pack in place. Tube threads out the top of the pack, and secures on the shoulder strap. Stretchy mesh exterior stash pocket. Bungies and straps can stabilize extra gear to the outside of the pack. Deep zippered exterior pocket, and smaller zippered interior pocket - ideal for stashing keys etc.