Custom Oregon Ducks Pillowcase 20"x30" Pillow Protector Cover WPC-5105 Custom Picture Pillow Cases 20" X 30" (one side). Made of 50% cotton, 50% polyester. The custom pillow case is without buttons,and has an opening on the side Having this soft custom pillowcase will add both comfort and style to your home. Nice hand feel due to top material with high quality.