Originally Posted by
RachelG
It has to be able to fit in the overhead bins. Since it is soft (I presume, it being a duffle bag), as long as you don't completely fill it, it should fit. My son has carried one of his seabags on, which if full would exceed the size limits, and had no problems.
I agree. Since it compresses, it can fit into any sizer if not packed full. They won't measure it by looking at the full dimensions, only by asking you to fit it into the metal sizer box. If it easily compresses to the required dimensions, you'll be fine.
Cheers.