FriXion Colors Marker Erasable Ink Pens. The newest innovation in marker pens lets you express yourself flawlessly and colorfully! Extra-durable point delivers vivid, bold lines in 12 vibrant shades. Unique, thermo-sensitive ink formula disappears with erasing friction. Streamlined, clip-less, roll-free design. Quick-drying ink that won’t bleed through paper. The pens are only erasable on paper, usually disappears with heat on fabric, please test on fabric before using.