Make mistakes disappear with this super handy Pilot Frixion pen! It's not magic, it's clever thermo-sensitive ink. The Frixion ink is erasable – not with an eraser, but with friction. The pen has a special rubber tip on its end; just rub it over your writing and the heat from the friction makes the ink turn clear. It's perfect for notes, planners, homework, or any situation where you might need to change your mind. This model is the 'Biz Slim' – it has a sleek, professional, and slim design that's great for the office or carrying in a portfolio. This specific one has black ink and a blue barrel. The pen writes smoothly like a good ballpoint. Just remember, because the ink disappears with heat, don't leave important Frixion notes in a hot car or near other heat sources. A fantastic tool for neat freaks, students, or anyone who loves to edit as they go!