Down is the extremely lightweight, comfortable & insulating soft breast feathers of ducks and geese that they use to incubate their eggs. It's quite rare & very costly, so Slumberdown created the next best thing! The lovely and snuggly hollowfibre filling is soft and comfortable, just like down, and the luxury microfibre cover feels wonderful to snuggle up into - it gently wraps around your body so you can be cosy and still move freely through the night. Slumberdown Feels Like Down 13.5 Tog Winter Duvet in White Size: Super King