22x22” Includes one pair Our hypoallergenic pillow insert is plump with white duck feathers for supportive comfort and luxurious softness you can sink into. Filled with 100% white duck feathers. Contains down certified to the Responsible Down Standard (RDS). 200-thread-count cotton twill cover. By choosing our cotton products, you're supporting our investment in Better Cotton's mission. This product is sourced via mass balance and therefore may not contain Better Cotton. Learn more at bettercotton.org/massbalance. Machine-washable.