Frixion is a brand of erasable pens and markers developed by Pilot Corporation. These writing instruments use a unique thermosensitive ink that becomes clear when exposed to heat, allowing users to erase their writing by simply rubbing the tip of the pen against the paper. This feature makes them popular for note-taking, drawing, and other tasks where mistakes are common. The Frixion line includes various colors and tip sizes, catering to different preferences and uses. They are often used in schools, offices, and by artists, providing a convenient way to write and revise without the mess of traditional erasers or correction fluid.