The Hyaluronic Acid 3 Serum by Cosrx is a deeply moisturizing serum designed to hydrate and strengthen your skin. With 3% concentrated hyaluronic acid, amino acids, and Ceramide NP, this serum improves moisture content, reduces redness, and fills in dryness lines for a youthful radiance. Ideal for dry skin, it protects against moisture loss and external irritants. Free from artificial fragrance, essential oils, parabens, and sulfates. 20 ml.