Made of high-quality natural materials, both sides are made of soft silk, and the inside is filled with silk cotton wadding. This ensures maximum light blocking, allowing you to create a pitch-black environment, even in the brightest of rooms. This sleeping eye mask is perfect for travel, home, flight, train, or anywhere where your sleep is bothered by the light. Orders of 3000 pieces or greater are eligible for sea shipping. 100% guarantee for quality.