Erasable pens are writing instruments that allow users to easily remove ink marks from paper. They typically use a special type of ink that can be erased with friction, often through a rubber tip on the opposite end of the pen. This feature makes them popular for note-taking, drawing, and other tasks where mistakes may occur. These pens are available in various colors and tip sizes, catering to different writing preferences. They are often favored by students and professionals alike for their convenience. Brands like Pilot and Frixion are well-known for their high-quality erasable pens, enhancing the writing experience.