oh, yes! why do people dress as if they're going to sleep when they fly?
i suppose they want to sleep while sitting in the airplane here in Mexico, new rich people or wanabees wear: "Ed Hardy" bling bling caps, mens messenger bags like louis vuitton citadin in damier geant (of course, most of them are replica), jeans of course, flip flops and polos or shiny tshirts
I HATE THAT TREND
we all call it the "dealer" trend ahahaha
Unless you’re lucky to have one of those sleeping areas (bed, etc). Even so, I wouldn’t want anyone seeing me in my bed clothes. For comfort: yoga pants, t-shirt, sweater or wrap flip-flops and/or socks and slip-ons can be just as comfortable. You can also bring pretty pillow cases for the nasty airline pillows. It’s not that stylish, but at least you’re not looking like a 2 year old. 

ditto.knee high gladiator sandals. i actually never liked them