Cold Therapy: Place the eye mask in the refrigerator or freezer to cool. Cold therapy helps reduce puffiness and soothe the skin, making it ideal for post-facial surgery care. Also suitable for pre-makeup facial de-puffing.  Hot Therapy: Soak the eye mask in hot water to warm it. Heat therapy promotes blood circulation around the eyes, relieves fatigue, and improves sleep quality. Enjoy the versatile benefits of the MDOG Cooling & Warm Gel Eye Mask Adjustable for a refreshing and relaxing experience.