A 100% pure mulberry silk eye mask is an absolute must for anyone in search of a restful sleep. The light blocking design of our masks helps to provide a deep, uninterrupted sleep during the day or night and are perfect for air, train and car travel. Our masks also help prevent sleep wrinkles and are hypoallergenic. The eye mask's adjustable strap is comfortable and spans from 15.8 inches to 24 inches. Made of 19 Momme (600 Thread Count) Pure Mulberry Silk on Both Sides of Mask