Features: Adjustable size, fit for most head shapes and different head sizes, which also covers the eyes and stays in place, suitable for both woman and man. Sound quality is very good, with long battery life and BT function, you can enjoy music easily every night to fall asleep without wearing earbuds. A great combination of abs and cloth, it feels smooth and soft, comfortable to wear, works well without gaps, no pressure on eyeballs. One button operation, cordless and foldable, you can easily turn it on and set a timer, it will be off automatically after using for 10 minutes. Ergonomic design, large head strap will make it more comfortable to wear compared with usual flat sleep masks. Developed with heat function, perfect for you to relax yourself. Specification: Type: Sleep Masks Material: Cloth, ABS Color: White Item Size: (When Unfolding): Approx. 206 * 76mm (When Folding): Approx. 135 * 77mm Package Size: Approx. 171 * 105 * 80mm Package Weight: Approx. 350g Package List: 1 * Sleeping Mask 1 * Charging Cable 1 * English User Manual