Cetaphil Optimal Hydration 48H Activation Hyaluronic Acid Serum is a lightweight serum that provides deep hydration that lasts for 48 hours and enhances the overall quality of sensitive skin. It is specifically designed for dry or dehydrated, sensitive skin. It contains Hyaluronic Acid and sunflower seed oil to smooth the skin’s texture and restore its radiant appearance. Cetaphil Optimal Hydrating serum also features Cetaphil’s exclusive HydroSensitiv Complex™ with soothing blue daisy, which enhances hydration and calms the skin, improving its quality over time. Enriched with Hyaluronic Acid, sunflower seed oil, vitamin B5, and antioxidant-rich vitamin E, Cetaphil face serum rehydrates and revitalizes the skin. It can be used alone or layered with Deep Hydration Healthy Glow Daily Cream for added moisture. Suitable for sensitive, dry, or dehydrated skin, it defends against five signs of skin sensitivity, including dryness, irritation, roughness, tightness, and a weakened skin barrier. Dermatologist-tested and clinically proven to be gentle, this creamy serum absorbs quickly, delivering deep hydration. Additionally, Cetaphil Optimal Hydration Serum is fragrance-free, paraben-free, hypoallergenic, and non-comedogenic.