leasant skin cooling with ice sorbet MISSHA Sheet masks! Secret of cool, more beautiful skin: Hot skin ages faster and suffers irreparable skin damage such as loss of elasticity, enlarged pores and many others. The optimal skin temperature is 31 degrees Celsius. At that level skin regenerates and radiates even and soft. how to use 1. After cleansing your face, prepare your skin with some toner. 2. Place the mask evenly over your face. 3. Leave the mask for 15-20 minutes on your face. 4. Take off the mask and knock the mask remains gently until they have been completely absorbed.