Material: The pillowcase one side is made of 350 thread count silk and one side is polyester Size: 20 x 30 inch Envelope closure for easy to use and maintain Hand wash is highly recommended Package including 1 pillowcase only, without pillow Our pillowcase is made of silk and polyester, with rich elastic touch, extremely soft appearance, not easy to wrinkle. The surface of the silk pillow cover is smooth and shiny, reducing friction on beautiful curly hairstyles and the face. And the envelope closure design avoids your pillow from escaping during your sleeping. Our silk pillow cover is suitable for home and hotel bedding.