Snowman Fineliner Drawing Pen - Set of 10 is lightfast and waterproof, making them ideal for use in paper crafts, journals, illustration, crafts, or any application requiring precision and permanence. Pigment based ink will not feather or bleed even through thin papers. Ideal for Doodling, Archival journals, Illustrations, Manga, Anime & Cartoon Design, Graphic Art and Design, Automobile Design.