Filter On Brush Liner is a slim brush liner that glides effortlessly to deliver precision and various eyeliner moods?that you want to achieve, even for a make-up beginner. Our slim and precise tip is flexible and easy to use. Control the thickness of your lines by pressing down with just a touch. CLINICALLY TESTED: ?Based on a Clinical Test on 22 women, I’M MEME Filter On Brush Liner 01 Black is considered to be Waterproof & Smudge-proof with one use.