COSRX The Hyaluronic Acid 3 Serum is a deeply hydrating face serum designed to restore moisture, plump skin, and strengthen the skin barrier. Powered by 3% hyaluronic acid, amino acids, NMF (Natural Moisturizing Factor), and ceramide NP, it penetrates deeply to lock in hydration and prevent dryness. This lightweight, fast-absorbing serum improves skin texture, boosts elasticity, and reduces tightness without feeling greasy. Ideal for dehydrated, sensitive, and compromised skin, it helps restore balance, enhance suppleness, and support long-lasting hydration for smoother, healthier-looking, and visibly plumped skin.