Fresh Ideas 100% Cotton Teflon Coated Pillow Protector Waterproof and Stain Resistant 2 Pack King, White 100% Cotton White pillow protector is made of 100% cotton with a 250 thread count. Teflon coating makes pillow cover waterproof and stain resistant. Zipper closure keeps your pillow fresh, clean, and free of dirt and debris. Protective pillow case measures 36 x 20 and fits a king pillow. Machine washable and dry for easy cleaning.