I am a big guy (5'10 and 325 Lbs) and I wanted to find a bag for some hiking. I enjoy it and need to lose some serious weight. A major concern was finding a bag that was going to fit me. This one fits with even a little room to spare. The bag itself is huge. I loaded it with about 65 lbs of gear and still had space left over. I went for a 2 hour hike at a park next to where I live and after adjusting the straps to fit the way I liked it, it was perfect. The weight of the bag was equally distributed and 65 lbs was like nothing to carry.