100% natural, biodegradable, and skin-affinitive cellulose. The concept of infusing beneficial ingredients into skins. The sheet mask forms a sort of barrier that really locks the ingredients in and prevents that evaporation. Used during or AM/PM start by cleansing face and then toning. The collagen sheet mask helps prep your skin to absorb the amazing ingredients that will follow in the next step. Apply mask to face for 10-15 minutes. After time is completed, dispose mask and conclude with moisturizer.