- Umisleep YZ01 sleep mask specially designed for side sleepers - Thin sides that adapt to the curvature of the temples, reducing pressure and improving relaxation - 10 mm 3D eye sockets that allow free blinking and prevent pressure on the eyes - High elasticity adjustable elastic band, suitable for most head sizes - Made with ice silk fabric and memory foam lining, soft, comfortable, and breathable - Opaque nose pad that blocks light, creating a dark and comfortable sleeping environment - Ideal for men and women seeking deep and restorative rest - Easy to care for: hand wash and air dry, recommended to wash 1 or 2 times per week - Black color, perfect for daily use, travel, or naps