Anything that doesn't have logos. I'm currently wearing a pair of hemp shorts and a hemp t shirt because it's more comfortable than cotton but it's only chainstore price level stuff. I can still get away with jeans when I go out and I never go anywhere that needs a suit these days although I did wear one at a wedding last weekend. It still fits too which is nice.

EDIT : as you can see from the picture I could lose a few pounds.