A. Packaging specification: 4 packs of sleep masks. This mask has two elastic bands, suitable for various head shapes. B. Sleep - aiding effect: This sleep mask can help you have a better sleep in daily life or during travel. When you take a lunch break in the office or want to sleep at night, it helps block light and relieve fatigue. C. Soft material: Our sleep masks are carefully made of comfortable and breathable polyester fiber fabric, with light cotton filled inside. They are light, soft and silky. D. Comfortable to wear: It fits the facial contour, with an ergonomic nose design. The sleep mask fits well and does not put pressure on the eyes, and there is little discomfort during sleep. E. Ideal gift: ILLUVA sleep masks are a good choice for travel, office lunch breaks, on the plane, in hotels, camping and home sleep. They are also suitable for activities such as games and parties.