Quantity: 20 Pcs black blindfold, enough quantity to meet your different needs. The head-mounted design is more comfortable than the ear-mounted design. . Size: Each sleeping blindfold size is 18.5x8.5cm/ 7.28x3.3 inches. Ergonomically designed, the eye mask will not move or slip off when sleeping. . Material: The outer layer of the eye mask is polyester, and the inner layer is filled with sponge. Exquisite stitching technology, using 2 elastic bands, more comfortable to wear. . Multiple Uses: This blackout eye mask can block more light and improve the sleeping environment it can help relieve eye pressure, eliminate eye fatigue, and help you get a better sleep quality. . Wide Application: Our sleep mask are suitable for travel, games, parties, meetings, rest, sleep, etc., suitable for computer users, students, elderly and stressed office workers.