Eyelash mascara is a type of eye makeup product designed specifically for use on the eyelashes. Mascaras can be formulated to do different things, but ideally, the best mascara should add volume or length (or both!) to your lashes. They (save for clear mascaras and mascara primers) also can add color to your lashes for a standout look. Regardless of the formula, though, the end goal is typically the same: to help enhance your natural eyelashes.