• Comfortable design with self-adhesive fit, suitable for head circumference from 50 to 65 cm • Elastic band and memory foam pads that do not squeeze or block the ears • Ear muffs that reduce noise and improve sleep quality • Foldable and portable structure, easy to carry and store in your suitcase • Perfect for office naps, dorm room studying, and nighttime rest • Dual function: ear muffs and sleep mask, blocks light and promotes sleep • Made with durable materials: cotton, spandex, and polyester • Removable and washable ear muffs, do not deform or develop odor after prolonged use