An optional 50 oz. retrofitted piece to keep you hydrated during hot and high endurance riding days.
- Elastic cord at the inside top of the spine protector allows the Hydra-Pak to hook onto.
- Bag is placed behind the hard plastic back/spine plates.
- Hose then comes over the right shoulder and attaches to a hook and loop tab on the left collar bone (this prevents the hose from shifting around while riding).