100% dark: -The design of the recently improved nasal bridge is adequate for all, effectively prevents the entry of light, keeps it in absolute darkness and offers a good atmosphere to sleep. The sleeping mask is very suitable to take naps, travel and relieve insomnia. 12 mm deep contour: -After a large amount of data research, the OSAez R&D team deepened ergonomically the contour of the contour of the contour of the contour of The 12 mm eye mask so that it not only adapts perfectly to your face