Introducing the an addition to Stila's One Step category: One Step Prime. The innovative, swirled, helix serum primer combines a crystal clear base with the perfect balance of skin-conditioning silicones. It fills in pores and fine lines, creating a smooth canvas that allows your foundation to apply effortlessly and enhances the wear time. Specially formulated Youth Revival Bio-Available Mineral Complex - an exclusive synergistic combination of 15 bio-available vitamins, nutrients and antioxidants. Oil-free, fragrance-free, paraben-free.