The Bio-Blends Liquid Liner Pen is formulated with an intense pigment and a long-lasting formula to give you dramatic and beautiful definition. The felt tip applicator is easy to use and gives both a thin or thick line allowing for precise application; a barely there look or a full winged effect! The tapered felt tip is inspired by calligraphy pens to give you a smudge-proof, elegant application. The water-based formula ensures that it is good for everyone, even those with sensitive skin.