COSRX The Hyaluronic Acid 3 Serum is a hydrating booster containing 3% hyaluronic acid that deeply moisturizes and strengthens the skin barrier. This concentrated serum helps retain moisture while promoting plumper, healthier-looking skin. Key features: • Contains 3% hyaluronic acid • Retains and locks in moisture • Strengthens skin barrier • Provides plumping effect • Suitable for all skin types • Lightweight serum texture The serum features a specialized formulation that works as a hydrating booster to improve skin's moisture retention capabilities. The hyaluronic acid molecules help draw and bind water to the skin, creating a plumping effect while supporting the natural moisture barrier. For best results, apply a few drops to cleansed skin during the serum step of your skincare routine, gently patting into the skin until fully absorbed.