💥 Stack It Up for Stunning Lashes! Stay flawless through any weather. Designed for maximum coverage and impact. Achieve salon-quality results at home. Ideal for both upper and longer lashes. Experience buildable layers for a bold look. Waterproof formula 0.41 oz size Mega brush design The MACStack Superstack Mega Brush Waterproof Mascara offers a unique buildable formula that allows you to layer for maximum volume and length. With its oversized brush, this mascara is perfect for enhancing both upper and longer lashes, ensuring a dramatic look that lasts all day, rain or shine.