Hzlrose Freddy's Marionette 2 Nights at Five Custom Unique Zippered Pillow Cases 18"x 18"(Twin Sides) The material is cotton and polyester It's a zippered pillow case, with a zippered opening on the side. Easy cleaning and maintenance Pretty and durable is our mark The perfect complement to your couch, custom pillows will make you the envy of the neighborhood.