This Copic Multiliner Pen is a fine quality inking pen. The pigment-based ink is waterproof and won't bleed or smear. These quick-drying pens are ideal for anime, plein-air, waterolor,  illustration, cartooning, pen-and-ink drawing, scrapbooking, and other detail work. Copic's polyester nibs won't roll or bend, and they're housed in a durable plastic case with "click fit" caps that prevent dryout