Bobbi Brown Intensifying Long Wear Mascara. Our longest-lasting mascara not only delivers lush, thick lashes but can stand up to elements (and even a few tears) for up to 16 hours. For maximum volume and results, we ve designed a new brush with unique bristles that easily reaches small lashes and instantly builds lashes without clumping. Best of all? There s no need for an eye makeup remover, because Intensifying Long-Wear Mascara washes off effortlessly with warm water.