Although I have never used it, I have washed it once. Also, I think there is some feeling of use because I kept it at home. Product Details Please use it for mattresses and pillows. Put it in a reusable zipper bag and put it in the refrigerator for about an hour to cool it, and you will get a more refreshing effect. Material with excellent breathability and moisture absorption. It provides a cool and comfortable sleep all night long. The pad protects pillows and mattresses, keeps them crisp, and allows you to use them for a longer time. If you put the cooling pad on a chair, you can get a cooling effect while working or watching TV. Easy to care for. Just wash and dry in warm water at 40°C. Designer IKEA of Sweden Product number 305.221.78