I don't know, I just don't like this product. It smudges and smears on me, even when using a primer, and even though my eyelids are not overly oily. I often reach for it because it's so easy to use and the packaging is great, but as soon as I buy a better one, I'll throw this out. Surprised it didn't work for me, but this barely stays put an hour. It's also not very black, so if you're looking for that boot black look (which I am), this won't help. And you can't go over your line more than once, as it flakes off. Blech.