A sleep mask made of the highest grade mulberry silk for the ultimate beauty sleep. What it is formulated to do: This luxurious, pure, one-size-fits-all Silk Sleepmask delivers antiaging benefits as it doesn't tug at delicate parts of the face. It's made with the highest quality silk, so it feels extra thick and softer on the eyes. Made using a trade secret production method developed over 10 years, Slip silk provides the ultimate combination of shine, thickness, softness, and durability.