100% SilkImportedMaterial:100% 19momme mulberry silk on both sides, Grade 6A quality. OOSILK is extremely picky in silk fabric selection and strictly controls the shrinkage and fastness of the silk fabric, giving OOSILK’s silk pillowcases a combination of softness, smoothness, and durability.Benefits:High quality mulberry silk is extremely breathable and hypoallergenic. It is cool to sleep on and can help prevent bed sweats. Silk fabric has 18 kinds of Amino acids that are believed to effectively stimulate your skin cells’ metabolism, therefore slowing the aging process.Silk’s natural fiber and tight weave allow the skin and hair to slide over the pillowcase very gently and freely, reducing facial wrinkles and preventing dry/ knotted hair. Silk never absorbs facial moisture; and it is 100% natural and original, perfect for those who have sensitive skin.Size:20x 36inches (51x91cm), fits king pillows. Hidden zipper design makes the pillowcase hold the pillow perfectly. Big opening and longer zipper allow you to easily fit the pillow into the pillowcase.Gift package! Each pillowcase is handmade according to our high standards and wrapped in a beautiful box. It is great gift for anyone and will provide her/him with quality, comfortable sleep.