BC BARE COTTON Luxury Hotel Collection Plain Pillow Protectors - Zipper - King Size - White - Set of 2 55% Cotton 45% Polyester Size : King (20x36) Made of 55% Cotton 45% Polyester Zippered for secured closure With ultra-soft cotton comfort, the pillow protector keeps your pillow fresh and clean, making it the perfect addition to your bed. Machine washable. Pillows are not provided.