Silk-filled duvets are naturally hypo-allergenic and resistant to dust mites, and also repel mould and mildew. They also seem to be very suitable for a British climate as the temperature-regulating properties of silk mean that they keep you warm in winter and cool in summer. Jasmine Silk can make them in any size or weight; What’s more, the Chinese believe that the amino acids in silk emit small particles called sleep factors, which are supposed to ease the nervous system, help you sleep better and improve your sense of well-being !