Cetaphil Optimal Hydration 48H Activation Serum is a lightweight, deeply hydrating serum designed to enhance the overall quality of sensitive skin. This powerful serum provides 48 hours of continuous hydration, leaving your skin radiant and revitalized. Infused with hyaluronic acid and sunflower seed oil, it replenishes moisture, soothes skin texture, and helps maintain the skin's natural barrier. The serum is dermatologically tested, paraben-free, fragrance-free, and hypoallergenic, making it suitable for all skin types, especially sensitive and dehydrated skin.