I machine washed cold and tumbled dry. They didn't fit me that great to begin with, and for what they cost, I wasn't trying to do anything special.
I usually wear the AA loose crew summer t, which depending on the color, come out fine after machine washing and drying. They don't last more than several cycles though, and end up getting holes near the seams. Not worth their retail price IMO.
I just ordered a few of these, and I'm hoping will work out better.