I tried this on and bought this at REI. I really wanted to love this backpack because it looks great, perfect size for a trip abroad and a carryon and its so durable. BUT my biggest issue was that the shoulder straps fit oddly on my body where it would dig into my Armpit/axilla causing me to have pain, numbness and tingly in both my arms. It was extremely uncomfortable and I only wore it with weight for 10 min. Im 51 and about 105lbs. I was fitted at the store too. I think it might also be because I have a relatively long torso and the pack didn't fit me well. I was so disappointed it didn't fit my frame. But its a great pack. Just be sure that it doesnt dig into you like it did me.