Kimspun Silk Pillowcase is made of 100% pure mulberry silk fabric and a luxurious 19 momme weight, hypoallergenic and breathable.Natural silk pillow cases are less absorbent than many other fibers so they help keep your skin’s moisture and prevent wrinkles, dry skin, and frizzed hair. Silk also adjust to your body temperature to stay cool in the summer and warm in the winter.Our 100% Silk Pillowcase closes with an oversized envelope flap which ensures the pillow will remain securely inside.Silk Pillowcases Standard size pillowcase measures 20 x 26, Queen size silk pillowcase measures 20 x 30, silk king pillowcase measures 20 x 36Silk Pillowcases are easy to handle: Hand or machine wash in cold water on gentle cycle. Hang to dry. Cool iron. Can also be dry cleaned.