The FriXion Colors range of erasable felt-tip markers write in vibrant colours yet erase wonderfully with friction. Just rub the rubber end over the ink and you can write on the same area again and again!
Exposing FriXion pens, or text written with FriXion ink, to heat (including direct sunlight) for a prolonged period may cause the ink to fade or become invisble. Place the pen or document in the freezer for 10 minutes to turn the ink visible again.
Product demo video.