COSRX skin booster serum with six peptides to hydrate, improve elasticity, and strengthen the skin barrier for smoother, healthier-looking skin. A lightweight skin-boosting serum formulated with six peptides to improve elasticity, hydration, and overall skin resilience. This fast-absorbing serum preps skin after cleansing while delivering deep moisture and strengthening the skin barrier. The peptide complex works to enhance firmness, smooth texture, and support healthy skin renewal. Suitable for all skin types, it layers effortlessly with other skincare and leaves skin plump and refreshed.