Neutrogena Hydro Boost Hydrating Hydrogel Mask with Hyaluronic Acid is a single use mask that instantly quenches skin, deeply hydrates, and leaves skin supple and hydrated. This unique hydrogel mask, with Hyaluronic Acid, instantly quenches dry skin leaving it deeply hydrated, radiant looking and feeling smooth and supple. Naturally found in the skin, Hyaluronic Acid helps to replenish moisture continuously throughout the day. This is no ordinary sheet mask. It is made of 100% hydrogel material which contours to your skin, sealing in the formula for optimal absorption and is clinically proven to hydrate.