Our pillowcases are made with 22 mommes 100% mulberry Silk. We use the most gentle, soft and strongest silk fabric available. Majesty Silk has a charmeuse finish. This is a more expensive and delicate finish, while also being a better insulator than other silk finishes. Most silk pillowcases available today are much thinner than the silk we use, making them more prone to wear and tear. Majesty Silk only uses the highest quality of 22 mommes, meaning there is more silk used in the weaving process and therefore a denser fabric for your luxurious comfort and the longevity of our pillowcases.