At the moment we've got a 4.5 tog synthetic filled duvet.
DH is a hot-body and refuses to have a thick duvet ( 10 tog too warm for him)
I was thinking of treating myself us to a duck down/feather duvet 4.5 tog.
I'd get a synthetic thermal sheepskin mattress cover as well.
Will this be warm enough, as well as keeping DH from combusting?
I'm told duck is more insultating than synthetic.