Mac prep and prime primer is a lightweight gel lotion formulated with special-effect silicones. It Evens out skin redness and skin tone while adding radiance, and also Improves the laydown and application of foundation or powder. For best use, Smoothen it evenly all over the face or to the desired areas after moisturizer (right before foundation) with fingertips, sponge or brush. Use every day even without putting on makeup and see how it almost generate the glow. Feels great of the face and it makes my makeup last for hours