In fact, I’m so obsessed with this pen and gloss duo, that for the past 10 months, I’ve used nothing else to fill in and plump up my particularly sparse brows. The ink itself is a lot more ...

"I think the Uni-Ball Micro 0.5 pen is the best pen overall. But the Muji 0.36 or 0.37 in dark blue ink is a very nice pen for other reasons. So those are the two I would use," Altman said.