Fine Bedding company Duck Feather and down Double Mattress Enhancer. This luxurious mattress topper is filled with the finest duck feahters and duck down, for a wonderful added layer of cushioning that gently moulds around your body. The cassette construction ensures even filing distribution, and the elasticated corner straps fit securley to any depth of mattress, enhancing lifespan and durability. Superb protection and the ultimate in softness and comfort. Specialist cleaning recommended, 100% cotton cover, 85% feather, 15% down filling.