MAC Stack Black Stack Micro Brush Mascara Stack on infinite layers of volume + length with M·A·CStack Micro Mascara. This never-before-seen continuously buildable, clump-resistant formula gives you customizable, weightless volume from natural to next-level. Mirror your unique mood and reflect your individuality with the Superstack Micro Brush, which delivers ultra-precise, controlled application and is ideal for shorter lashes or lower lashes. Magnify your eyes and enlarge your lashes with this major mascara must-have! FULL SIZE Color: Black Stack Brand new in packaging, never used or tested.