Stack on infinite layers of volume + length with our new breakthrough formula, which means layer after layer, lashes stay perfectly defined and feathery soft - no clumping, no flaking, no smudging. Build customisable lashes to suit your style with this must-have mascara that does it all. 95% saw instant lift and length! From natural to next-level volume, stack on MAC Stack Mascara to suit your style, occasion and mood. How many layers will you stack? Pick your perfect MAC Stack brush for personalised application: • The Mega Brush: delivers instant volume at first swipe and is ideal for longer or upper lashes. • The Micro Brush: delivers ultra-precise, controlled application and is ideal for shorter lashes or lower lashes.