It's smudge proof once it dries and it dries pretty quick
It was a good deal and it came with stencils which helped me a lot cause my eye brows are all over the place.  The pen is not hard to use, just follow the instructions.  The chestnut color I picked was a little too light for me.  Next time I will definitely go darker. I normally like brown, but the chestnut one was lighter than I thought.
Rating: 5 stars