Check out these Star Wars Costume Hoodies. Each one will set you back about $50 on the thinkgeek website. Not only do they have printed graphics that resemble the costumes of the characters, but they also have hoods that envelop your entire head with mesh eye-holes.
The hood itself is printed, and you can zip it up for additional anonymity. The Darth Vader has a classy pinstripe look on the arms and a blank back. The Stormtrooper has the Star Wars logo on the back. Our favorite, though, is the Boba Fett, complete with rocket pack printed on the back.