Stack on infinite layers of volume and length. Our featherweight formula layers endlessly without clumping. Lashes appear perfectly defined with a feathery soft lifted lash look. Available in a waterproof formula – and now introducing M·A·CStack Mascara in Chestnut Brown – a soft, flattering shade that suits all skin tones. Stack on for more natural-looking lashes. 95% saw instant lift and length. 24-hour wear. Clump-resistant. Weightless. Non-flaking. Consumer testing on 111 women after using Mega Brush for one week.