I absolutely LOVE these gloves.  I own three pairs, but I was up here looking for another pair because my dog ate two pairs of them, and I'm missing one of the other gloves.  I live in Colorado, and I've used these down into the low teens...I think they're incredibly warm (and just coming from Texas, I'm not used to the cold!).

I just bought the new ones that are lined with the funky silver stuff and I DO NOT like them as much.  The silver lined new ones are tight and uncomfortable, and I had a size XL on those.  However, my hands usually run medium to large, and in this particular glove the medium was perfect.

I recommend them highly.