Product size: 10cm*20cm Material - Made of mulberry silk on both sides. super-soft, super smooth environmentally and economic mulberry silk offers the breathable, cool relaxation of the soothing masks. Most gentle care to your eyes Adjustable Band - Features dual tension-adjustable bands for optimal fit, easy to adjustable and headband won't tangle hair. No chemical smell and generic size A comfortable sleep mask that can be used anywhere: in a bed, during a flight, in a hotel or a long car ride and so much more. Ideal for insomnia, migraine headaches, dry-eye sufferers and travelers,it creates a good sleep environment so that you can sleep well Block out All Light - Completely blocks out all light and visual stimuli so you can nap or sleep soundly anywhere Design - LightWeight Silky Sleep Eye Mask. It is ergonomic designed by relieving stress and relaxing muscles. Providing the best experience for sleeping.