If you were going to rob a bank, what sort of disguise would you wear?

I don't know what I would wear...never thought about it, but there were two different ones I read about that I thought were "genius". On one occasion the robber only put a red clown's nose on (no other disguise), and when the cops tried to get a description of the perps nobody could think of anything but that red nose. Similarly, on another occasion the robbers ( I think it was a male and female) entered the bank stark naked and it was so surprising and shocking that nobody could give a good description to police.