-Functional Magnets: Upgrade new built-in 20 magnets can relax eye muscles, this sleep mask is ideal for people who have insomnia, migraine headaches and dry-eye. -Adjustable :Size 21.7cm*10.2cm, Equipped with adjustable head belt, which can be adjusted the length and tightness to fit your face. You will not feel any tight feeling and ensure the mask wont move and fall off. Supply you with wonderful night. -Improve Sleep Quality: With this sleep mask that will naturally block the light, it can help you get a deeper , longer and faster sleep. Use it at any place like office, long-car travel, train, travel. -High Quality Material: This eye mask is made from velvet and magnetic fiber cloth, which is breathable, soft and comfortable to wear. Far-infrared functional magnetic fiber fabric can release far-infrared rays to supplement magnetism. -Black, 100% brand new and high quality. Package include: 1Pcs * Magnetic Sleep Eye Mask.