What It Is:MAC's award-winning mascara is now waterproof and smudge-proof for 24 hours!What It Does:This all-new continuously buildable, clump-resistant MACStack Waterproof Mascara gives you customizable gravity-defying volume, along with instant lash lift and length in a pool-proof and tear-proof formula. Stack on infinite layers of volume and length while repelling water with MACStack Waterproof Mascara! Drench-Defense Technology helps to wrap this waterproof masc MAC MACStack Waterproof Mascara-Beauty & Cosmetics