RDS Certified Natural Fill - Generously filled with ethically sourced 85% duck feather and 15% duck down, this king size quilt gives you the prefect balance of warmth and breathability - ideal for year-round use in spring, summer, autumn and winter. Naturally Better Sleep - Unlike synthetic duvets, natural fill offers breathable warmth that adapts to your body temperature, gently cocooning you for deeper, more restful sleep - perfect for those who want to feel snug without overheating. Box Stitched & Cotton Cover - The natural fill on this duck feather duvet is encased in an ultra-soft, breathable 230 thread count cotton cover, and is finished with a box-stitch construction to keep the fill evenly distributed - no clumping, no cold spots. 2-Year Guarantee - Sleep peacefully knowing that our cotton duvet has been carefully crafted and hand finished in the UK. We are dedicated to delivering exceptional quality and ultimate comfort, backed by a thorough 2-year guarantee. Easy Care & Machine Washable - Snuggledown kingsize duvet is machine washable at 40°C and tumble dryer safe - stays fresh, fluffy and looking new with minimal effort, night after night.