I would not wear a tank, for many of the reasons mentioned, especially a god-awful lot of fabric to arrange in a small plane seat. However, I have flown 5 or 6 times in the past year, and every time I was wearing a UK and it was bliss compared to wearing pants on the trip. Especially on a longer trip, I would not consider wearing pants. Of course, I won't consider wearing pants for anything now, so I might be biased!