The COSRX Full Fit Propolis Lip Sleeping Mask is a nourishing treatment designed to intensely hydrate and condition your lips while you sleep. It forms a protective barrier to lock in moisture, helping to soften dry and chapped areas overnight. Apply a generous layer before bedtime. Wake up to visibly smoother and more supple lips, ready for the day ahead. Ideal for use as an intensive overnight treatment or a deep conditioning balm during dry weather.