I love this for when I want to tightline.

Usually everything runs and leaves a bit of black smudging on the outer corner of the bottom lash line by the end of the day no matter what, even if it says waterproof. So I gave up on tight lining but this STAYS. It's amazing. I love it. And it's so pigmented so you don't need much.

Also the brush is quite nice for tight lining but just make sure you wash it to prevent eye infections.