Cuddle duds makes a complete line of really nice looking long underwear. Kohls carries all of it, there is a super soft line and a heavier, warmer line. I am very partial to the soft ones because many things irritate my skin and these are feather light, I wear them indoors. The heavier brushed ones are perfect for outside. They are flexible and fit under clothes easily. They come in fashionable colors.
There is also a really nice fleece lined robe that looks like an enormous ankle length sweatshirt from l.l.bean. I only take it off to wash it.
I bundle up all winter long and we keep the heat on 72. I am always cold and it makes the pain a lot worse. Hope this helps.