I saw someone wear an argyle-print T-shirt once, and was deceived until I was right next to him; that's when I realized he wasn't actually dressed in a fancy sweater -- he was faking preppy!
T-shirts that fake a certain look can take a piece once considered ultra-casual, and make it appropriate for even a work setting. The cotton tees also don't come with the itch most argyle sweaters do, they cost way less, and they're comfortable and breezy, making them ideal for even the summers.
The ones featured are from BlueFly and are only $25!
Check out some more fake style tees: