Hada Labo Gokujyun Hyaluronic Acid Face mask is a high moisturizing face mask featuring a variety of essential ingredients. It contains 3 types of hyaluronic acid which is an ingredient that provides moisture. Hyaluronic can hold 6L of water with 1 and it is present in every part of the body which is why a hyaluronic mask can effective provide you the moisture needed when you encounter dryness in your skin.