Pilot - FriXion Light Fluorescent Ink Erasable Highlighters (6 Color Set)

Need to temporary highlight text? Now you can mark up your pages and then erase your highlights with the Pilot FriXion highlighter. It works by using thermal ink that disappears at high temperatures. The friction between the eraser and the paper generates heat and causes the ink to go away! Pretty neat. However, you may want to avoid using the highlighter on valuable books you don't want damaged.