The Ultra LR, designed for long distance runs, scored pretty high in our tests. It is the most unusual looking hydration pack we tested: with two massive breast pockets you look like part fishing guide and part photo journalist. All this coverage gives a lot of places to store items and a lot of ways to balance the load while running. This pack scored the highest for stability — most of the weight is around the waist and the rest can be easily cinched down on the upper body. Overall we liked the Ultra LR but prefer the CamelBak Marathoner, which is lighter, easier to fill, less expensive, and more streamlined. The Marathoner is also just better for the runs we go on most (1-5 hours) where the Ultra LR seems a little overkill unless you are on, well, an Ultra Marathon (50+ miles and 5-15+ hours).
The Ultra LR has similar features to Octane but has a vest style setup instead of the more standard backpack backpack straps.