SELECTED MATERIALS: The outside of the sleep mask is made of soft, breathable fiber. The inside is filled with super soft rebound memory foam. These materials provide a soothing feeling to the skin for a peaceful sleep .CONTOURED DESIGN: This sleep mask is based on ergonomics. It features a 3D contoured cup design that eliminates eye pressure and allows you to blink ly. Designed for maximum comfort LIGHT BLOCKING: We found that the bottom of regular eye masks is the most likely to leak light, so we made a reinforced convex area at the bottom of our eye masks for better light blocking ADJUSTABLE FIT: Adjustable buckles and elastic straps allow this sleep mask to fit a head circumference range of 20-26 inches, this size fits all women and men and provides a secure yet gentle fit during sleep time SUITABLE FOR ALL SLEEPERS: The ultra-thin 15° tilt angle on each side of the mask minimizes pressure on the face when sleeping on the side. It allows both back and stomach sleepers to sleep comfortably