What it is:A lash-conditioning mascara primer that conditions and primes lashes to maximize results—creating even longer and more volumized lashes.What it does:Give your lashes an XL boost. With just one sweep, this innovative mascara primer glides on to evenly coat and smooth your lashes, maximizing the results of your favorite mascara. The magic behind this mascara base is the conditioning formula—infused with micro-fibers and vitamin E—which adds the look of extra length and thickness to lashes for added visible performance. White in color, it allows the black pigments to stand out from the clean base with more intensity than with traditional mascaras.What else you need to know: CILS BOOSTER XL lengthens and thickens the look of lashes to maximize the results of any mascara. Use CILS BOOSTER XL as a “lash mask” at night on clean lashes to nourish and rejuvenate.Beauty Tip:Apply the luxurious Rénergie Lift Multi-Action Eye Cream (sold separately) before using CILS BOOSTER XL for a youthful, radiant, wide-eyed look.