COSRX The Hyaluronic Acid 3 Serum 20ml is a powerful hydrating serum that plumps the skin with moisture. As a matter of fact, this highly concentrated serum deeply hydrates the skin with a single application. For this purpose, the formula stars 3% Hyaluronic acid, a well-known ingredient for its ability to retain moisture, that deeply and lastingly hydrates the skin. In addition, the formula contains Ceramide NP and an Amino acid complex, that further hydrate the skin and reinforce the skin barrier. As a result, this serum hydrates and strengthens the skin barrier. Very effective, it leaves the skin dewy and feeling hydrated all day long! With this in mind, this serum is a true hero for dry or dehydrated skin. If you often experience makeup clumping or dry patches, this serum is also a great option! To sum up, this serum is the perfect ally for intense hydration and barrier protection.