Poodles a Frixion Pen is like a small tipped felt marker that after used to mark your quilt with marks can be removed by ironing. They come in several colors & work really well. Just don't get the marked area into really freezing cold weather or the marks come back & you have to iron again LoL. They do work really well for marking on light or medium fabrics. They can be pricey at the LQS so it's good to know Staples sells them. I'm hoping they are cheaper there so I can buy a few to stock up.