・These markers have vivid colors like poster paint! ・Excellent water resistance, so it won't run when dry. ・Water-based, so it won't damage materials and has no unpleasant odor. ・You can write over it when dry. ・No bleeding or show-through. ・Opaque ink, so you can write on metal, glass, plastic, etc. ・This is an 8-color set with extra-fine tips.