The FriXion line of pens write smoothly and erase cleanly so you can erase every 'oops' (the written ones, at least). FriXion offers you unlimited do-overs so you can write, erase, and re-write until you get it right, without any wear or tear to the paper or messy eraser crumbs. The heat generated by erasing friction causes our unique thermo-sensitive gel ink to become clear so the words disappear completely from the page. Mistakes are a thing of the past with FriXion. Now nobody needs to know it wasn't perfect the first time!