Yes, they are Washable, note NOT water soluble, but washable. You must wash the quilt in detergent for the marks to disappear. If you just want to use the marks for placement, think about using ordinary white school chalk and if you need it to be more longlasting then going to the water soluble blue markers is a better bet. Also, the new Frixion pens are amazing. The ink disappears with a hot press of the iron. Carly in SC