For Cold Use: Cool the product in the freezer for 20-30 minutes. Hold it in your hand until it reaches a consistency suitable for contact with the skin. Then put it under your eyes. The coolness of the mask helps reduce eye puffiness and dark circles. For Hot Use: Soak the product in hot water for 5 minutes. Keep it in your hand until it is cool enough for skin contact. Then apply it under your eyes. The warmth of the mask helps relieve eye fatigue.