New, sealed product Best if used within 12 months of opening This Intensive Hyaluronic Mask contains Hyaluronic Acid to instantly moisturize, restore firmness and radiance to the skin. The product claims to immediately plump the skin and correct wrinkles by rehydrating from within. The mask is to be left on for 15-20 minutes and then rinsed off, two to three times a week. However, it can also be applied as an overnight treatment. It is most suitable for those with extremely dehydrated skin.