Feature?One Size Fits MostSuper elastic straps allows this Gel Eye Mask to fit different head size of women or men, and help to hold the eye mask in place, you can adjust the strap to make the cold eye mask tight to your eye area to enjoy the cold compression.?Hot Cold TherapyFor Warm Compress - Place the Eye Mask in microwave and heat it on Medium-high for 10 seconds at a time. For Cool Compress - Sealed the Gel Eye Mask in a storage bag and then place it in fridge for ice pack. Freeze it for 35 minutes or chill it for 1-2 hours. The eye mask is then ready to relieve your swelling, aches and pains.(NOTE WHEN HEATING: 500W microwave for 15 seconds, 800W microwave for 10 seconds (if you heat for too long, the product will expand as the temperature rises, so control the heating time))?Ideal for TravelAn Eye Mask for at home, everyday use, and travelling, the adjustable strap ensures comfortable sleeping and relaxing in any position, in any place.Easy to useCold Therapy----Put it into freezer for at least 1.5 hour, or place it until the prhes the temperature you want.Hot Therapy----Microwave for 10 – 15 seconds intervals until desired temperature is reached. Total heating time must not exceed 20 seconds maximum.Note: Do not touch the skin immediately after freezing to avoid damage caused by low temperature.Specifications:Material：-Material for pouch: 0.3mm thickness PVC;-Material of plush backing: 100% polyester;-Material for Stuffing: glycerin, gel beads,and pure water;-Quantity: 1 pieces eye mask for puffy eyes-Color: Light BluePackage Content:1 x Cooling Eye Mask