They are always the best choice whether you are sketching, doodling, coloring, scrapbooking, drawing, writing diaries, calligraphy or making decoration in all kinds of activities. With these amazing pens, your life will be full of creativity and happiness. - Dual tip marker features both a flexible brush tip and firm fine tip, Blendable, water-based ink - Brush pressure can be used to create medium or bold strokes - Ink is water-based blendable, odorless and non-bleeding - Acid free and non-toxic