Just graduated school in the Navy, looking for one bag to take to my first PCS, and this bag side jsut that and more. I know it said XL so I assumed I was gonna have some extra room, but THIS BAG HAS SO MUCH ROOM. I got to take extra clothes I wanted to that I didn't think I could, because of the expansion size of this bag. For sure this is the best bag for traveling in the military. I recommend to everyone who needs large storage.