I love the Frixion pens. They come in four colors and the markings disappear when you press with a warm/n]hot iron. The marks will come back if you put your quilt in the refrigerator but disappear again when you press them. If you were to leave a quilt in your car in the winter in Ontario, you might need to press again. But in Texas, mostly we could just leave the quilt outside in the sun and get rid of the marks. I hope you find something you like. froggyintexas