Can anybody advise me on this. Ive had ds in a grobag since birth and now he's moved up to a big bed. I had bourght a normal grown up duvet - 10 tog but it seems very hot and he throws it off even when whether is cold. I note that the mothercare ones are 10 tog as well? I'd bourght a synthetic one just for ease of washing. Did you start with a 4 tog one?