Are you from the north?
It is cold and humid in winter in the south, and there is no heating, but there is basically warm air conditioning indoors, if you don&;t go to some fly shops.
Northerners&; frost resistance may be weak. As a southerner, I have no down.
If there is no special cold air, we say that winter is not cold. We southerners basically wear leggings, that is, you say long-sleeved trousers and short skirts, and then a long-sleeved shirt and a cat will be fine. Those who are afraid of cold will add a sweater.
You can refer to it