Green tea extract of JKOSMEC GREEN TEA ULTIMATE HYDRATING ESSENCE MASK contains catechins that inhibit active oxygen, which is one of the causes of aging, as well as return energy to dull skin. Regulates sebum and water-oil balance of your skin, making it healthy and radiant. Green tea extract also contains tannins, which have an antibacterial effect, protect your skin from the consequences of stress and sunlight.