I appreciate that but I'm a bit north of those Midwest states and today, for instance, with the temps at -25C and the wind chill into the -40s I'd still go with down filled.
The coat was specified for arctic conditions, but I can understand how the demands of different locations and tasks can affect that, as well as personal comfort levels.
If you wanted to be one-and-done (i.e. the 'look' and full warmth in one parka), something like the Rickson's repro of the B-9, a late WWII fur trimmed down parka, might be the ticket.
In my case, I have a packable down jacket I use as a liner with field jackets and the like. I can't imagine being in conditions too cold for that worn under the N-3B, but Northeastern winters should be more than covered by the N-3B itself.


