COSRX Low pH Niacinamide Micellar Cleansing Water is a deep cleansing micellar water that is specially adapted for sensitive skin. With a low pH value, it is gentle and does not irritate the skin during or after use. It contains Niacinamide which helps control sebum overproduction and reduce pore size. The product is also enriched with Allantoin, Madecassoside, Hyaluronic Acid and Panthenol which soothes, moisturizes and strengthens the skin barrier.