-Waterproof, breathable and durable thin, flexible and soft membrane provides compatibility with your skin, prevents the feeling of thickness. - Dust, dirt, moisture and liquid completely prevents, thus extending the life of your pillow and breathable feature provides a comfortable and comfortable sleep. - Long life. It can be washed 100 times at 90 ° C. - Easy to use. Does not require ironing. - After washing, it should be sprinkled and dried. - There are two kinds of zipper and cover.