Made of Top-Quality natural mulbrry Silk on both sides, Very soft , breathable and comfortable.The breathable fibers of the interlayer are very light and do not apply pressure to your eyes.; The specially designed elastic nose flap is perfect for blocking out light.; The desgin of three straps keep your eyes pressureless,we improved three elastic straps ,They can make the junction be stressed uniformly.; The elastic straps are adjustable in length; they will fit from 18-25 inches (XL size, one size fits all). the high quality strap will be at the back of your head.; Come with a portable bag and noise cancelling earplugs, they are good travel essentials and travels gifts, and can be used at home, in the office, in a hotel, on a plane or in a car, enabling you to quickly get into a deep sleep.