GR8 All Day Smooth Mask is a purifying mask with essence containing Brassica Oleracea Acephala Leaf Extract and Camellia Sinensis Leaf Extract to protect your skin from hazy air with fine dust.The mark sheet is made of 90% Tencel Cotton and 10% Microfibre. The GR8 thermometer mask features a smart colour-changing star mask design. The lower the skin temperature, the darker the star colour stays. The stars will change colour according to skin temperature. In addition to the \"thermometer\" function, it is also the \"timer\" for masking. When the stars appear, it means \"cooling process is completed!\" You can take off the mask, you will find that the thermometer mask is extremely moisturising!