The pillow case with ice silk is cool but not ice in summer, the coat is equipped with a zipper, which can be taken apart and washed (it is not easy to machine wash, it can be washed with warm water and hung for drying). The inner core of the memory cotton is soft and can be used for a long time without deformation (it is not easy to be exposed to the sun and washed, it can be dried in a dry and ventilated place).