It goes the distance - and then some
Nathan got everything right with this one. It is highly adjustable for a perfect fit, the straps are soft and can even be worn on bare skin, the front pockets hold enough food for a few hours, and the pack is just large enough for what you need for a long day on the trail. This pack is great for long training runs and races when you need to have to either be self contained or won't have an aid station for 3 or more hours. I have used numerous other hydration packs and this is the only pack that I turn to for running.