Unauthorized sunglasses are another example of a uniform violation. Sunglasses are allowed to have conservative ornamentation on the frames and lenses. Frames may be black or brown material or gold or silver wire. Brand name glasses may be worn with a small logo on the frames or lenses. The logo must be the same color as the frames or lenses. Conservative wrap-around sunglasses may be worn. Sunglasses must have conservative lenses and frames (faddish styles and mirrored lenses are prohibited). Sunglasses cannot be worn in formation. Sunglasses cannot be worn around the neck, on the top or back of the head, or hanging exposed on the uniform. For more information, see AFI 36-2903. (U.S. Air Force photo illustration)