Marianne - June 5, 2024 I did buy the Aerial Infinity 17 and haven't had any problems fitting it under the seat. The water resistant fabric is great - it might be raining outside but your gear stays dry. I love the fact that there are so many compartments so I can always stay organized. It holds my lap top, I-pad, and a couple of files all in the computer slot. I've used the USB port you just need to get the right adapter. Best of all is how much stuff it holds!!! I can get on the plane with just the backpack and leave my purse at home.