This FriXion highlighter pen erases writing with frictional heat! This set includes six soft, subtle colors. Once your writing has dried, rub the rubber on the back of the pen to erase the color! Because the color is erased by frictional heat, there's no eraser residue, so you can rewrite in the same place multiple times. Even if you've marked too many things and can't remember which ones are important, or accidentally underlined the wrong spot, this FriXion highlighter lets you easily erase marks on documents, notebooks, and planners.