Since the line can be easily erased, you can easily mark your reference or notebook. Features: Highlighter that can erase brush marks with friction. The newly developed "Fluorescent FriXion Ink" uses fluorescent pigments and uses the friction heat generated by rubbing with the special rubber on the back of the body, the ink will change colorless when the color is reached to the temperature of the erasing setting is reached. Unlike writing instruments that erase with an eraser, there is no eraser residue. It also features very little eraser than pencil or mechanical pencil eraser marks. Write and erase again You can write repeatedly on the erased area. [How to use] After the brush mark is dry, you can use the special rubber on the back of the shaft to erase.