This pillow is made of 95% grey duck feathers & 5% duck down and it has a cotton protective cover. Add flair and comfort to your rooms with new fluffy pillow inserts covered with your favorite covers/shams. Decorator"s not: It is always recommended that the insert should be 2 inches larger than the sham. Example: for a 26" X 26" sham, you need a 28" X 28" insert.