Prep + Prime Lip is a color-free base designed for wearing under lipstick to reduce feathering while providing long-term hydration, smoothing and refining the lips. It also improves the overall appearance of your lip products.How to use: Apply a thin coating over your entire lip area, including over your lip edges. Follow with lip color. If desired, line your lips. * Oil-free; fragrance-free. * Dermatologist-tested. * By M·A·C.