Sub-acid mask that gently permeates Glutathione into the skin, brightening the skin tone like snow. Brightening Care - Glutathione and Niacinamide ingredients are evenly absorbed into the dull skin, producing the skin tone bright and clean. Sub-acid Mask - The fruit vinegar ingredient makes the skin to healthiest and slightly acidic state by controlling the pH balance disturbed by the external environment. , , Comfortable Air Mesh Sheet - With highly permeable mesh material, the sheet adheres lightly to the skin for it to breathe, and delivers active ingredients gently.