PURE MULBERRY SILK PILLOWCASE WITH HIDDEN ZIPPER: This pack includes one 600 thread count, silk on both sides 19 Momme silk pillowcases with a hidden zipper closing mechanism. This design allows the silk pillowcase to be held overnight without moving around. A large opening mechanism and long zipper allow you to fit the pillow into the silk pillowcase easily.BEAUTY SLEEP WITH ULTRA SOFT, SMOOTH SILK: the silk??s natural fiber and tight weave allow the skin and hair to slide over the pillowcase freely and gently, reducing facial wrinkles, and preventing dry and knotted hair, and reducing hair loss. Silk pillowcases do not conduct static electricity.PURE HIGH-QUALITY SILK LUXURY PILLOW CASE ?C This pack contains one pure silk pillowcase This pack is a perfect gift for you to give your loved ones on holidays such as Christmas, Mother??s day Valentine??s Day, Birthdays, or Anniversaries.GREAT FOR HAIR AND SKIN, ANTI ALLERGENT ?C BlueHills?? mulberry silk is a natural fiber which repels dust mites. In addition, its hypoallergenic property eliminates allergies and asthma, which are caused by cotton and other synthetic fibers. This product is a great gift for anyone who enjoys deep, restorative sleep!CHOICES OF SIZES AND COLORS: BlueHills pure silk pillowcase comes in 3 sizes (Standard size is 20 X 26 inches; Queen size is 20 X 30 inches; King is 20 X 36 size inches). There are various color options available as well.