Full disclosure, I have a blog and was sent this for free to review a while ago. I have to say that I don't understand why no one thought of this before. I have my favorite mascaras one for volume and going out, one for some volume and definition during the day, etc. And this you can put on top of any of your other favorite mascaras to make them waterproof. It is a thin clear gel like a clear mascara that was easily applied. If you try to put on lots of this, it will make your lashes start to stick together. Make sure you go down too the roots too otherwise you are only partially waterproofing, and in the pool or at a wedding, partially waterproof isn't good enough!