This Slumberdown Climate Control 13.5 Tog Winter Duvet cleverly regulates your temperature, so you don’t get too hot or too cold as you sleep. Containing a scientifically proven Dacron hollowfibre fill, this specially developed filling has been formulated to carry excess heat and moisture away from the surface of the duvet – drawing it from your body so you keep at a regular temperature. The more heat you generate, the harder the filling will work to keep you cool. But if you’re already cool, the clever Dacron hollowfibre filling won’t allow you to get too cold either. As well as helping you have a comfortable night, you can also sleep easy knowing that there's nothing in this duvet that could cause allergic reactions, as it’s naturally hypoallergenic. Being a 13.5 tog duvet, it’s an ideal option for winter and for cooler months, or for those who prefer a warmer duvet. The Climate Control pillow pair complements your new Climate Control duvet perfectly. Containing the same clever Dacron hollowfibre fill, the pillows will carry excess heat and moisture away from the surface of the pillow – drawing it from your head so you keep at a regular temperature. As well as helping you have a comfortable night, you can also sleep easy knowing that there's nothing in this Climate Control duvet and pillow pair bundle that could cause allergic reactions, as they’re all naturally hypoallergenic.