I'm using brown. At first I was amazed at how thin it is. The pen is really soft and I can draw it smoothly without blurring. Even someone clumsy like me can draw beautiful lines with it. However, it's a twist-up type and once you twist it up it won't go back. So it's a small drawback that you don't know how much of it is left inside. I was worried so I bought more for stock lol.
An 1.5 mm hyper-slim gel eyeliner. It glides on your eyelids with a smooth application, allowing you to draw lines easily. With such a slim tip, it is also easy to fill in the gaps between lashes. Resistant to water, sweat, tears, and sebum with a water-proved formula.