I used this as a Backpack cover/carrying case when checked my pack for an international flight. Pack is a SMD 50L Fusion fully packed and it fit perfectly in this duffle. No damage to this duffle or my pack by airline :) I LOVED that it folded down so small and flat to carry in pack after I landed. I would easily recommend this as a general travel duffle as well for airline checked bags. You could fit ALOT of stuff in it.