Product details:Introducing the world's first slip-free silk. Designed to stay in place throughout the night, the NonSlip crossweave technology allows for dual fabrication. The outer is 100% luxurious mulberry silk that reduces wrinkles, hair breakage, and breakouts. The inside is made from lyocell, which gently grips your mattress keeping your sheets from slipping off. Night Silk Non Slip Flat Sheet, Queen