1.Microfiber 2.HYPOALLERGENIC DOWN ALTERNATIVE FIBERS: Our Heavy Smoothly Woven Microfiber pillow inserts are filled with treated hypoallergenic premium down alternative fiber which provides the same fluffiness and softness as real down and ultimate comfort and support. 3.VERSATILE USE: Ideal for decorative shams of any type irrespective of where you have bought or existing. These throw pillow inserts are the perfect choice for adding extra comfort and style to any space be it a home or office. Best for use on sofas, chairs, beds, and decorations and can be a great seasonal gift. The pillow inserts are resilient and as they are made with high-quality materials, our pillow inserts retain their shape and bounce, ensuring lasting support for years 4.AVAILABLE IN VARIOUS SIZES: A1HC Pillow inserts are available in various sizes to fit into your chosen pillow covers. We recommend you use one size bigger insert then the pillow cover for more fluffiness. 5.HIGH QUALITY WITH EXTRA FILLING AND SELF PIPING: The pillow inserts are constructed using the finest materials. They have self-piping, and the corner strength does not let the insert split from the edges and maintains a great shape. The pillows are well filled, ing 15-20% more filling compared to others. This helps in more comfort and support.