Plush fleece-lined tights. Between $30-$35.
I can't even describe how much I luuuuuuuurrrrvveeee these tights. They're super cozy with the fleece lining, with the added benefit they are much more tear-resistant than other pairs. Extremely comfortable!! They come in the footed and footless versions, and I recommend you buy multiples. I bought mine in black and gray, and I'm certain I will snap up any more colors that become available. Since its the holiday season, I highly recommend picking up a pair for the women in your life, especially if they enjoy wearing skirts and dresses. It will be a much loved gift for sure!!!