Our mulberry silk pillowcase all were crafted from 100% natural protein-rich mulberry silk fabric which will give you a very great sleeping experience. Two Closure:Envelope Closure,Zipper Closure.3 Momme style 19MM,22MM,25MM.Two Flange Oxford,Housewife.High quality silk pillowcase will provide many years of regular use,which save for us .Protect our hair to a certain extent,Farewell to dry and frizzy hair.