Stack on infinite layers of volume + length with MACStack Mascara. This never-before-seen continuously buildable, clump-resistant formula gives you customizable gravity-defying volume from natural to next-level, along with instant lash lift and length. Mirror your unique mood and reflect your individuality with the Superstack Mega Brush, which delivers instant volume at first swipe and is ideal for longer or upper lashes. Magnify your eyes and enlarge your lashes with this major mascara must-have! What It Does: A continuously buildable mascara that stacks on infinite layers of volume and length, with a bigger brush that delivers instant volume and is ideal for longer or upper lashes. Key Claims and Benefits: 24-hour wear Clump-resistant Weightless Flake-resistant Research Results: 95% saw gravity-defying volume* 95% saw instant lash lift and length* 95% said mascara builds endlessly* *Consumer testing on 111 women after using Superstack Mega Brush for one week. How to Use: Press the brush into lashes close to roots and shimmy brush through from roots to tips. Keep stacking the weightless, clump-resistant formula for limitless volume and length potential. 0.41-oz.