The clinically proven formula is enriched with two sizes of 3x-concentrated* Multi-Weight Hyaluronic Acid. It hydrates the skin’s surface plus its upper surface layers. Skin feels fresh, hydrated, and is immediately visibly smoother. The ultra-lightweight hyaluronic acid serum won’t clog pores, and is suitable for all skin types, even sensitive skin. Use with Eucerin® Face Immersive Hydration Daily Lotion and Eucerin® Face Immersive Hydration Night Cream.