There aren't many things better when you're traveling than getting upgraded to the luxury of first class. Have you ever wondered what exactly makes you stick out as "upgrade" worthy? Well, a flight attendant has officially revealed that what you wear actually does make a difference when it comes to upgrades.
Rule #1 - no sweats or leggings. They say that as comfortable as passengers may want to be, "putting a little more effort in your appearance can go a long way."
For the complete list of what you should and shouldn't wear, click here.