It is a moisturizing mask that NMF (natural moisturizing factor) sodium hyaluronate & witch hazel soothe dry & thirsty skin while allantoin with trehalose promotes a tightening & firming effect. The bamboo cellulose sheet forms a perfect fit on the skin to ensure maximum delivery of the essence. As the mask dries it turns white & contracts providing a slight tightening effect. The MEDIHEAL logo printed on the surface of the mask appears gradually over time & informs you when it is time to remove it.