America’s #1 long-wear eyeliner! This updated waterproof formula glides on with incredible smoothness and sticks with you for up to 24 hours. Revlon ColorStay Eyeliners have a new, improved formula that glides on easily and stays where it should for up to 24 hours. Draw precise lines with the sharp pencil tip, or blend and diffuse eye makeup with the built-in smudger for a smoldering, smoky look.