I recently went to Alaska for work and ended up going to an outdoor store near my hotel where they recommended this to me. (Bought another from Amazon as a gift for relatives moving to upstate NY.) It made a world of difference being outside. I actually wore it covering my nose and mouth and it made me quite comfortable in -30 weather, even when my breath was freezing over on the outside of it (will upload customer pic). It's really soft material too, so it's very comfortable against your skin.

The only drawback to it was when I was going in and out of stores being a tourist, after being inside for a few minutes my neck would start getting sweaty from being too warm. Obviously common sense should prevail here though, and most people will just be wearing it outside and not in and out.