These are the finest made color changing silks that we have ever seen.
With the double color changing silk you can wear two colors in your pocket as a regular decorative men's handkerchief and anytime during your performance you can look down, say that you don't like those colors with the suit you are wearing and change the handkerchief into two different colors. The single one is basically the same but uses only two colors.
Self contained and very easy to do. Also great for clowns and lady magicians.