Migraine Relief Hat Ice Pack Headache Relief Gel Eye MaskProduct information: Product material: Lycra elastic cloth, gel (light solid) medical gel; single gel thickness 8mm. Product size: free size 22*17*1. 5cm Applicable head circumference: 42 66cm Color: black, pink Tip Ice compress and hot compress use: ice compress put it in the refrigerator for two hours, you can take it out for ice compress; hot compress put it in a microwave oven to heat, and the heating temperature is controlled at 50 . Packing