What it is: A vitamin-infused eyelash primer that glides on and coats your lashes in one sweep, maximizing the results of your favorite mascara.What it does: The conditioning, clump-free eyelash primer adds length, curl and volume to your natural eyelashes. Its formula features microfibers along with vitamin E to help stimulate eyelash growth and help add extra length and thickness for a visible improvement on the performance of your mascara, completing your eye makeup look. How to use: Apply one or two coats, working the eyelash brush from lash base to tip in a zigzag motion. Follow with several coats of mascara. It can also be used as a nighttime deep conditioning treatment for your eyelashes.Pro tips: For best results, apply your mascara when Cils Booster XL is still fresh on the lash. It will go on smoothly, creating more length and better separation than your mascara on its own.- 0.19 oz.- Winner of Allure's 'Best of Beauty' Award for Best Lash Primer, 2021