It comes with 2 pillowcases | Standard Size: 20x30 King size:20x40100% Polyester Satin | Satin refers to the weave of the fabric( how it's put together) not the fiber(what it is made of).No Knots in the morning!!! | Not only leaves your facial skin feeling soft and smooth, but also helps your curly hair be less tangled by reducing frizz.Make sure to use COLD water ONLY on the gentle cycle and better AIR DRY it hanging on a rack instead of tumble dry.Envelop closure(no zipper)|wrinkle resistant