Wrapped in 100% cotton, these duck feather-filled inserts enable you to achieve the ideal fluff and karate-chop effect on your cherished pillows. There's no need to worry about sizing up or down – our sizes seamlessly align with our exclusive Twenty Third pillow covers. In our longstanding journey of providing pillow covers, we endeavored to seek out the highest-quality pillow inserts to enhance our exquisite pillow cover designs. These inserts have been meticulously sourced from the market's finest, expertly crafted from top-tier materials to deliver the ultimate karate-chop effect, ensuring a plush and opulent pillow experience. Pillow Insert Properties: Fabric: Crafted from 100% cotton in a white, down-proof weave.