The hormone melatonin regulates the day-night cycle of the human body and controls the recovery phases during the sleep. For the production of this hormone, the human body requires sufficient darkness. Lightness prevents the production of melatonin. Even a little light caused, by any electronics like your cable box, laptop, digital alarm clock can be a disturbance. A good sleeping mask will naturally help you increase melatonin levels and increase REM sleep. Our this sleeping eye mask is the one. Features: 1. Prefect light blockout but breathable: Special 'nose wing' design can effectively block lights coming from the nose area, so you can get sound sleep or relax your eyes whenever or wherever. 2. Ultra Soft and comfortable: Made of high quality cotton material, this eye mask offers you a soft and fresh touch on eyes, which can release your facial stress and help you get into sleep rapidly. 3. Easy to adjustable: This sleep mask can be adjusted in length to perfectly fit the various heads without tangling your hair or feeling tight. It is suitable for women, men and kids. 4. Light weight and compact size: It is lightweight and portable, so you almost barely notice that they're on your head. 5. Foldable design makes it possible that you can easily carry the sleep mask with you wherever at work, on travel or at home. 6. Washable: It can retrieve to its original after washing it. Specification: Item Type: Sleeping Eye Mask Item Color: Black, Grey (Optional) Item Size: Approx. 14 x 4 x 20 cm / 5.5 x 1.6 x 7.9 inch Package Weight: Approx. 109 g / 3.8 oz Package Include: 1 * Sleeping Eye Mask Note: 1. The real color of the item may be slightly different from the images shown on the website caused by many factors such as your monitor brightness and brightness of the light. 2. Please allow 1-2 cm error due to manual measurement. Please make sure you do not mind before you bid. .