Product Description Good quality down duvets are beneficial to allergy sufferers – the high thread count of our duvet covers excludes dust mites and the drier environment (compared to a synthetic duvet) also discourages mites. Down Filled Duvets: Options – White Goose Down & Feather – 85% Feather & 15% Down A great blend of finest white Goose Feather and Down to create a superb balance between warmth and weight. All wrapped up in a premium 233 thread count cotton cover. White Duck Down – 70% Down & 30% Feather Encased in a 233 Thread Count Cotton Weave cover, these duvets are a fantastic balance of superior Down with a sprinkling of finest feather to provide a warm cosy feeling. Looking for interior inspiration? Take a look at our Pinterest boards for heaps of ideas. Down Filled Duvets: Tog Ratings – Our down filled duvets are given tog ratings; the higher the tog, the warmer the duvet. Wondering which tog to choose? It depends on how warm your bedroom is and how warm a person you are. But also on the warmth of your mattress and the thickness of your duvet cover. Please see a breakdown of the different togs below; 4.5-6 tog is appropriate for summer use and for a warmer blooded person throughout most of the year. Add a quilted bedspread and blankets on colder nights. 9-10.5 tog down filled duvets are perfect for a cooler room throughout the year. Add a quilted bedspread on colder nights. 13.5 tog duvets suit a cold bedroom and cold winters. Although this is the most frequently purchased tog rating, for many people (for much of the time) it may well be too warm, especially during milder winters/summer.