I haven't worn my hydration pack in a couple of years. What I have been doing is carrying 2 water bottles in my front randonneuring bag in addition to the two on the frame. It has worked so far. I think once it really gets hot, I'm going to have to add the hydration pack. Should have bought a new bag for it, the old one has a crummy design that will soak you if you don't put the lid on just right.