The Superhero Pen Eyeliner helps you easily create both thin and thick lines along the lash line with a 24-hour waterproof and smudge-free formula. Unlike typical felt brush tips, this tip doesn’t fray and glides effortlessly across your lids to create eye-transforming definition in one seamless stroke, thanks to the proprietary Elastic Stretch No-Skip Technology™ and Triple Black Pigment Complex, which creates a jet black, flawless line. Peptides, collagen, biotin and oil-absorbing kaolin clay simultaneously help strengthen lashes.A liquid eyeliner pen makes application easier.Has a waterproof and smudge-free formula. Strengthens and improves lashes with peptides and collagen. SKIN THERAPIST TIPPress lightly to create a thinner line and press a little more to create a thicker line.