I use my speedy 30 as a carry on bag to put my cosmetics, jewlery, and other items I do not want to check in. When I traveled last month, I went to baggage claim to pick up my duffle bag which I had checked in and it came out 1/2 unzipped!!!! Thank goodness I had placed a large calendar I purchsed on the very top so I did not lose anything but how that happened I have no idea!!! I was extremely alarmed as the zippper doesnt seem like it would come unzipped on its own (especially to the point where the bag is 1/2 open!!)