Anua Retinol Niacin Night Care Mask 24ml X 10eaA night care intensive sheet mask formulated with retinol and niacinamide to address wrinkles, elasticity, and skin tone in one step. Designed to support skin turnover overnight with retinol for smoother texture, while niacinamide helps brighten dull looking skin, it leaves the complexion feeling firmer and more radiant by the next morning. Each mask contains 24 mL of essence in a single sheet format.