SYNCHRO SKIN GLOW luminizing fluid foundation R5 SYNCHRO SKIN GLOW luminizing fluid foundation #R5 is a medium yellow-based shade. It has a natural, light-to-medium coverage that is buildable and can be used to even out skin tone and blur the appearance of imperfections. The formula is enriched with a triple blend of hyaluronic acid, Vitamin E, and advanced Skin Sync Rx™ technology to help nourish and moisturize skin for a glowing, radiant finish. The foundation is also formulated with SPF 20 to help protect skin from sun damage.