Birds On A Wire Two Sides Decorative Square Zippered Throw Pillow Case Cushion Cover 18x18 inch 50% cotton, 50% polyester The pillow case has an opening zippered on the side. Custom Zippered Pillow Cases 18x18(The Front side is the same to the back side) Perfect indoors & outdoors decoration makes the pillow a perfect match in any room Hidden slide fastener design for good looking and easy to machine wash