A single coat of this conditioner before applying mascara helps to strengthen, lengthen and thicken your lashes. It also helps make your mascara twice as effective and allows you to use less. Jane herself has called this the one product no girl should live without, and even suggests wearing it alone at night to help strengthen and condition. You can even use it on your brows to help them become healthier, smoother and more manageable. Just use one coat of this on your top and bottom lashes and then immediately apply your mascara on top and watch how your lashes stay looking fabulous all day.