Today I'm wearing what may be the LEAST travel friendly "Iron-Free" shirt I own... a cotton Tommy Hilfiger Ithaca Collection button-down. If you look at this shirt funny, it wrinkles. I can't even make it from home to the office driving without it wrinkling horribly... the worst part is it holds any minor crease (from sitting, for example) for the rest of the day. It's a great shirt and looks wonderful on the hanger after being pressed, but that's about the only time you'll see it without wrinkles.