Enhance your lashes with MAC Cosmetics Stack Mascara. Sleek design. Easy application. Color: Stark Stack MACStack Legit Lift Lash Primer Stark Stack Size: 0.41 oz MACStack Legit Lift Lash Primer. Meet MAC's ultimate lash hack: Maximize volume, length, lift and all-day hold while conditioning lashes with their NEW castor oil-infused primer. Then, stack on infinite layers of MACStack Mascara formula. 93% said product helped reduce smudging* 92% said lashes looked longer** 92% said lashes look more lifted** 92% said lashes looked fuller** Lengthens and lifts Works with all mascaras