Clio Superproof Pen Liner Kill #01 Black 0.55MLAchieve sharp, defined eye looks with lasting precision using the CLIO Superproof Pen Liner Kill Black #01 0. 55ML. This high performance liquid eyeliner features a fine, flexible pen tip and a superproof formula that glides on smoothly for crisp, controlled application. The intense black shade delivers rich, bold colour payoff that stays put through water, sweat, and oil perfect for everything from everyday definition to dramatic winged styles.