Thought I couldnt do much better than Octane LR untill I found Ultra LR. Feels so light on the shoulders. Love the front pockets to put smaller bladders in so when I fill up at a creek, I put my purification tablets in , and after time is up I just dump it in the big bladder and carry on. Really helps to stretch out water on long or overnight runs. With Camelback standing behind their product with the lifetime guarantee, this combo is hard to beat.