Find freedom in infinite do-overs. FriXion Fineliner Erasable Marker Pens have a durable porous tip that lets you write smoothly and erase cleanly, without damaging documents, or messy eraser shavings. The heat generated by erasing friction causes the unique, thermo-sensitive ink to become clear and disappear from the page. You can write, erase, and re-write until you bring your vision to life. Make written mistakes a thing of the past.