If you know anything about It's Always Sunny in Philadelphia, you know the gang always has cool t-shirts and great wardrobe. You can tell so much about a character by their outfit, and Mac's t-shirts in particular show off his unique brand of humor.Mac's shirts are a thing of art. Some of them look like were dug out of a bin at Goodwill and others were maybe given to him by Charlie, who probably found them in a dumpster. Some are custom and brilliantly written and nearly all of them are hilarious. Now's your chance to vote on all his awesome t-shirts! Vote up the funniest of Mac's shirts from Always Sunny below!