Tuck them in with a wool-filled duvet for year-round cosy bedtimes Wool is a wonderful natural material & it's the ideal fill for year-round slumbering. Wool is naturally temperature regulating; essential as children are less able to regulate their body temperature than adults. The natural wool fill is proven to keep your little ones warm when it's cold, but help prevent overheating when the weather's warm or the central heating is turned up high. & it's not just about temperature regulation. A wool duvet is proven to improve sleep quality meaning brighter, happier children the next day. Who wouldn't want that?