This Royal Elite European Down Duvet is filled with RDS certified European White Duck Down of 600+ fill power. European standards often prioritize strict regulations regarding sourcing, cleaning, and processing of down, resulting in a superior down product. European down typically has excellent insulating properties, providing warmth without excessive weight. European down is often more durable compared to down from other regions.Despite their warmth, European Down Duvets are breathable, allowing moisture to escape and preventing overheating during sleep. This helps regulate body temperature and ensures a comfortable sleeping environment.Available in four sizes, Twin 66 x 88'', Double 80 x 88'', Queen 90 x 88'', King 104 x 88''.