Description Quantity: 24 pcs black eye masks, sufficient quantity to meet your various needs. The head-mounted design is more convenient than the ear-mounted design. Size: Each sleep mask measures 18.5x8.5 cm/7.28x3.3 inches. Ergonomically designed, the eye mask will not move or slip off while you sleep. Material: The outer layer of the eye mask is polyester, and the inner layer is filled with sponge. Exquisite sewing technology, with 2 elastic bands, more comfortable to wear. Multiple Uses: This blackout eye mask can block more light and improve your sleep environment. It can help relieve eye pressure, eliminate eye fatigue, and help you get better sleep quality. Wide Range of Applications: Our sleep mask is suitable for travel, games, parties, meetings, rest, sleep, etc., suitable for computer users, students, the elderly, and stressed office workers.