Below 15F what kind of condensation do you get on the inside? I've been wearing the nosepiece from a half-mask respirator, but without the filters, and while it shields me from the windchill and pre-warms the air slightly, there is a huge amount of condensation during my hour long commute.

With the device you mention, from where does it draw air? Does it go all around you neck like a gaiter and you draw the air in via your outer shell or is the back open around the neck and you draw in and exhaust that way? Or is the device perforated somewhere?