high quality Silk and Soft Fabric: Made of high-quality silk material, it is a porous fiber with good moisture absorption and breathability, soft and lightweight, breathable and comfortable, helps relieve eye pressure. Packaging and Size: 4 pieces of silk sleeping eye masks, 4 colors (black, navy blue, dark green, gray), each size is 7.87 x 3.93 inches/20 x 10 cm, enough quantity for personal use, you can share some with family or friends as a beautiful gift, bring them a deep, uninterrupted sleep Effectively block light: The eye mask can completely cover your eyes, and the padded fabric on the inner nose bridge can block all light, ensuring that you sleep at home, hotel or plane, beautiful travel accessories to help you feel rested and refreshed. Improve sleep: Breathable natural fibers allow healthy oxygen to enter while preventing dry air from entering, which makes the sleeping eye mask suitable for insomnia or dry eye patients, it can also provide you with a quiet environment to help you fall asleep faster and more deeply. Adjustable Strap: Fits all head sizes, comes with adjustable buckle and strap, extended adjustable range to fit almost all head sizes, fully adjustable strap from 15.3" to 21.3" (flexible, max range can be increased), suitable for women/men/kids/back/side sleepers