The new M·A·C Stack Waterproof Mascara offers longer and more voluminous eyelashes with every coat, with its water-resistant formula that lasts up to 24 hours! You can create longer, more voluminous and curled eyelashes with its formula that does not feel heavy, is water resistant, does not smudge, does not clump and does not fall out! Create flawless looks on your eyelashes in any length you want, with the ability to apply in layers! You're in control with M·A·CStack!