ISNTREE Hyaluronic Acid Deep Moisture Water Mask is formulated mainly with 3 types of Hyaluronic Acid(Sodium Hyaluronate, Hydrolyzed Hyaluronic Acid, Sodium Acetylated Hyaluronate), Trehalose, and Sodium PCA that fills your dry skin with moisture.They also protect your skin by creating a moisture barrier that prevents from moisture loss for a long time.Closely adhering mask prevents the evaporation of moisture The synergy of 5 types of Hyaluronic Acid and aqua gel sheet keeps moisture closely to dry skin. UP-GRADE Better hyaluronic acid mask Contains 50% MORE hyaluronic acid than the existing hyaluronic acid mask! Hyaluronic Acid Deep Moisture Water Mask has been proven to be hypoallergenic with skin irritation index of 0.00. Hyaluronic acid is an essential ingredient for the skin It is dubbed a Water reservoir\' as it draws in 1,000-times its volume in moisture. It prevents dehydration and helps to maintain the level of moisture necessary for healthy skin.