COSRX Oil-Free Ultra Moisturizing Lotion with Birch Sap is a lightweight, fast-absorbing moisturizer designed to calm and hydrate all skin types—especially oily, acne-prone, or sensitive skin. Formulated with 70.8% Birch Sap (Betula Platyphylla Japonica Juice), it delivers deep moisture while helping to soothe irritation and balance oil production. Its non-greasy, oil-free formula makes it an ideal daily moisturizer to restore skin health and elasticity without clogging pores.