SSG makes a winter warmer glove, I just bought some, so I haven't tried them yet. But the reviews are great on them! And they feel warm when I try them on.
I have a pair of ssgs and love them so much. The only complaint I've ever heard from other people is that they are slightly spippery, but once they're broken in I find they're fine. They're really warm without being too thick; keep my hands from going numb in -25 celcius and are also great work gloves for in the barn