This lengthening and columnizing primer is designed to enhance the benefits of your mascara and condition your lashes at the same time. It is formulated specifically for sensitive eyes and is free of dyes, making it safe and gentle to use. The primer can be worn alone overnight as a lash and brow conditioner to help nourish and strengthen your lashes. It can also be used as a primer before applying mascara, helping to extend the wear and improve the overall appearance of your lashes. To use, simply apply one coat of the primer and let it set for 30 seconds. Repeat with a second coat, let it dry for 30 seconds, and then apply your mascara as usual. This primer is a must-have for anyone looking to boost the health and appearance of their lashes.