This shirt is absolutely outstanding for wearing in very hot weather. The first wearing by me was to a 2-hour outside graduation ceremony in Arizona in late May, with the temperature in the 90s. Admittedly, there was a mild breeze, and it was nighttime, but there were thousands of people packed into the bleachers, but at the end of the two hours I was still quite comfortable in the shirt and it wasn't wrinkled at all. Can't beat that!