Summary Our hypoallergenic square pillow insert is plump with white duck feathers for supportive comfort and luxurious softness you can sink into. Filled with 100% white duck feathers. 200-thread-count cotton twill cover. Machine-washable. 18" sq. Made in USA of imported materials. Use & Care Care Spot clean with a mild detergent and warm water. For more thorough cleaning, wash the insert in a commercial-size front-loading machine with warm water and mild detergent. Tumble-dry on low in commercial-size dryer for a minimum of 2 to 3 cycles to ensure filling is completely dry.