When they say waterproof, they mean it. I love this eyeliner. Best money I've ever spent on eyeliner. My previous purchases always faded or wiped away completely after a few hours. I constantly found myself reapplying and when I wasn't able to reapply, I ended up looking like a hot mess. Not with this brand. I was quite impressed with the results and it's been through it all. Sweat, tears, and wiping of the hands. When I pair it up with my favorite eyeshadow primer, it is unstoppable. The only thing that gets it off, is baby wipes at the end of the day.