It's really cold here. I'm wearing fleece pants, a heavy thermal cotton long sleeved shirt, and a wonderful LLBean plaid flannel shirt with a fleece lining.
I bought 3 of these great LLBean shirts, because they are incredibly warm. The lining goes all the way down the sleeves, which seems to make a big difference. The first shirt I found in a thrift shop, an incredible bargain because it was new with tags. I bought 2 more online, because I loved the first one so much.