A radiant primer that preps skin for smooth makeup application, and delivers soothing hydration and radiance for up to eight hours. Size: 1 fl oz / 30 mL. The radiance-revealing partner in prime. Create a comfortable canvas that’s truly yours with this illuminating primer that preps skin for smooth makeup application and delivers eight-hour soothing hydration and radiance. The hybrid water-gel formula features our Moisture-Reserve Technology with good-for-skin ingredients, including hyaluronic acid and glycerin to help hydrate skin instantly and all day for a fresh, cushiony feel. MAC STUDIO RADIANCE MOISTURIZING + ILLUMINATING SILKY PRIMER.