As an update to my opinions on a cut above; if you fly in tropical regions with lots of heat and humidity, go with the cotton blend. I have the tropo fitted shirts, and they breathe poorly compared to my Van Heusen shirts. Also, the cool and dry collar, while a novel idea, chafes quite a lot if you've been sweating, which you will with the tropo. I really like the fit, but next time I think I'll go with the cotton blend.