"Big Bang Theory Sheldon Costume T Shirt Impersonate super-brainy Dr. Sheldon Cooper with this Big Bang Theory t shirt designed to look like one of his typical outfits. The Big Bang Theory Sheldon Costume T Shirt is beige and features an image of a red Flash t shirt topped by a safari vest. Sheldon often wears the Flash t shirt with the yellow lightning bolt logo, and you can zing your friends by saying ""Bazinga!"" as they take in your new look!".