★Filled with 95% duck feather and 5% down, these inserts add support, comfort and softness to any decorative pillow. ★100% cotton/down proof cover to prevent feathers from poking out. ★The feathers are sterilized for safety. We recommend sizing up for a full, plush look. ★For example, the 17x21” insert is perfect for a 16x20”. ★Available in a variety of sizes to meet all your decorative pillow needs.