MATERIAL??Polyester. SIZE: for 18×18 inch (please note: no pillows). EFFECT: Protect your pillow from dust, potential liquid spills and food splatter, or as a replacement to your old pillow cases. EASY CARE THROW PILLOW CASE: Each pillow case is machine washable, with a hidden zipper for easy placement and removal. PROFESSIONAL CUSTOMER SERVICE- If you have any questions please just feel free to contact us, we will spare our no effort to help you.