The fleece rocks!
On my winter warfare last february, I wore my Gortek Parka, with the gortex long undies (forgot the acronym, IECS or something... whatever), windpants, Mukluks, and the good ole wool took (all republican guard green of course, except the whites... whatever, still good stuff).
I was COOKING out there. To make things worse, the coldest it got was about -10, so it wasn‘t especially comfortable. The stuff I was wearing, I‘d wear if it were -40 or below.
What I got out of that ex, asides the fact that winter warfare ex‘s really suck, is that
-Muckluks are crap to do ruck marches in, as they have absolutly no ankle support.
-piling layers on CAN be a bad thing.
-The ordinery gortex jacket, combined with a fleece and windpants (with only long jons) would be perfect for -39 to -10.
-The cotton scarf is the best piece of kit (imo)
-using common sense and wearing what you‘d wear skiing (only with issued kit) on a pretty cold day, is the best way to go.
I hear the new gortex stuff starts falling apart if it‘s kept in intense cold for any prolonged period of time. One lady came back from a 6 month callout in the Yukon and she said her jacket started turning brittle and fell apart. Dunno about the validity of that though... anyone else?