I started out with the FlexAir small pillow then switched to the FlexAir Large pillow available here at BPL. I used it for about a year, but then moved to the MontBell like a lot of folks. The FlexAir only weighs 1 oz whereas the MB is about 2.4 oz, but as Brett above and others have noted if you integrate it with an MB sleeping pad it is a great combo. Even if you don't the MB pillow is thicker than than the FlexAir and "sculpted" better to cradle you head than the FlexAir. The FlexAir, however, is cheaper and lighter, and reasonably durable. Can't go wrong with either one.