We designed the Riem specifically for those who like big, fluffy, warm duvets. German bedding technology and a superior-quality new duck down blend from the Pyrenees are encased in a soft, 100% cotton French batiste shell, extra tightly woven to prevent dust mites, and finished with sateen piping. The whole thing is light and incredibly breathable, and will keep you toasty on cold nights. The Riem has a warmth rating of four for extra cosiness, and has inner straps, ensuring the filling stays in place.