DOUBLE SIDEDThe sleep mask is made of ice silk and birdeyes, soft and comfortable. Two different fabrics allow you to experience different sensations. The cool side keeps you cool and comfortable, and the warm side keeps you warm and relaxed. BLOCK OUT LIGHTThe sleeping eye covers are filled with micro-air polyester, which is more blackout and light enough to not put pressure on the eyeball. Combined with the triangular nose design, it can block the light no matter day or night. ADJSTABLE SIZEThe sleep mask adopts hook and loop fasterer, which is adjustable, and it will not knot your hair or feel tight even if you wear it for a long time. Plus, eye cups cover your ears to reduce noise for a restful, uninterrupted sleep experience. WIDE USEIt is very suitable for lunch breaks in the office or at home, long car trips, airplanes, meditation, camping, hotels, etc., a good helper for you to improve your sleep quality and give you more energy for work and study. ONE SIZEThe size of the sleep mask is about 67x9cm/26.38x3.54inch, suitable for both men and women and those who like to sleep on their side. Naturally breathable, no skin irritation, and no elastic bands to prevent your ears from being rubbed and stuck