These king-size pillow protectors, sized 20×36 inches, are crafted from soft, breathable, OEKO-TEX certified polyester for a luxurious hotel-grade experience. Each cover includes a silent, rust-proof zipper that keeps pillows securely enclosed while resisting wear. Machine washable and color-stable, this 4-pack provides long-lasting softness and reliable protection for most king pillows in homes or guest rooms.