CoverGirl Olay Simply Ageless Serum Primer s moisturizers penetrate the epidermis, leaving a smooth base on your skin like a primer. The lightweight, creamy formula goes on clear and is easy to apply with fingers across your whole face. It preps skin to help create a smooth canvas on which foundation can be applied. Working under foundation to provide continuous hydration and moisturization, CoverGirl Olay Simply Ageless Serum Primer is the only primer, formulated with the power of Olay Serum, to help firm the look of skin. The formula contains ingredients from the amino-peptide complex that is used in the Olay Regenerist line, along with glucosamine, a key ingredient in the Olay Definity line. Questions? 1-800-4cover4