A continuously buildable, clump-resistant mascara that stacks on infinite layers of volume and length in a waterproof and smudge-proof formula. Our award-winning mascara is waterproof + smudge-proof for 24 hours! Continuously buildable, clump-resistant M·A·C Stack Waterproof Mascara gives you customizable gravity-defying volume, along with instant lash lift and length in a pool-proof and tear-proof formula. Our Drench-Defense Technology helps to wrap this waterproof mascara around your fringe to protect each individual lash by repelling water. Stack on infinite waterproof layers of volume + length with M·A·C Stack Waterproof Mascara! Waterproof, smudge-proof, pool-proof and tear-proof, 24 hours Clump-resistant & Weightless.