Sits well for running. I used it on a 17 mile run through the mountains of Japan to hold water, some snacks and extra layers in case it got colder. No bouncing around like other packs. Haven't tried it out yet at max capacity for all day or overnight trips, but from everything I can judge it is outstanding. I have owned a cheaper daypack of similar size and can tell you this one is worth the extra money if you are serious about adventure sports.