This is a great product. Recommended by my quilting lady. It's a wonderful product to use for all types of craft projects where you don't want the lines showing after the project is completed. Just apply a warm iron and the lines disappear. Obviously, once lines are set, don't apply a hot iron. But if you put in a wrong line, go over it with a hot iron and start again. I have three colors, but these come in a variety of colors.