This is one of my favorite birchbox discoveries. The opportunity to use this liner with any color already makes it amazing but because it's clear, the product has the ability to be thicker and a little more waxy for better staying power. You can slather it on outside your lip lines to make sure your color wont bleed out, and you don't have to be as precise as you do with a colored liner. All in all, everything I've ever wanted in a liner. And you'll never see it smudge!