Cetaphil Optimal Hydration 48h Activation Serum is specifically formulated to provide intense, long-lasting moisture for dehydrated and tired facial skin. This advanced serum works to strengthen the skin's natural barrier, enhancing its ability to retain hydration over 48 hours. It actively soothes irritated skin while delivering essential nourishment. Infused with a powerful blend of Glycerin, Sunflower Oil, Shea Butter, and Hyaluronic Acid, this formula penetrates deeply to revitalize the complexion, leaving skin feeling refreshed, plump, and visibly healthier.