This serum is infused with Cera-HA™, a patented ingredient designed to deliver deep and long-lasting hydration to the skin. Enriched with Niacinamide that helps strengthen the skin barrier and creates a smooth texture. Clinically tested and suitable for sensitive skin. How to use: Apply a moderate amount to the skin and gently dab for better absorption. The ATOBARRIER365 HYDRO CERA-HA SERUM is a lightweight, fast-absorbing serum that delivers intense hydration and reinforces the skin barrier. Powered by CERA-HA, a next-generation hyaluronic acid incorporated with ceramides, it helps lock in moisture and offers 2x longer hydration—supporting long-lasting hydration and a stronger, healthier skin barrier. CERA-HA, an advanced blend of Hyaluronic Acid and Ceramides, delivers intense hydration and reinforces the skin barrier—offering twice the moisture retention compared to Hyaluronic Acid alone. To enhance long-lasting barrier protection, Ceramide Stabilization Technology is applied. Since ceramides are oil-soluble and typically don't dissolve in water, they are encapsulated in a mesh structure. This allows effective formulation into an ampoule and enables them to remain in the skin's outer layer for up to 18 hours, maintaining a strong barrier and locking in moisture. The result? Skin that feels intensively hydrated and comforted, with no stickiness or heaviness. Moisture is delivered quickly to dry, sensitive skin, while the skin barrier is visibly improved—creating a powerful synergy that supports lasting hydration and healthier-looking skin from the first use.