wool is great, but........................
heavy when it gets wet, dry clean only(costly these days), everything sticks to it, storage in the off season(moths).
I have grown up in the northern woods of NY, most of our hunting is done in the cold season. I grow up in Woolrich wool hunting cloths, now after 35 yrs of hunting I don't have one piece of wool clothing that I wear in the woods. (with the exception of my socks)
I gradually switched over to newer/lighter/modern materials and actually find myself warmer with the layering set up I currently had put together.
Yesterday for example, temp 19 degs. & calm, I stood on watch (in the open woods) for 3.5 hrs before I started to get a chill.
Set-up: polypro base layer shirt, Cabela's med. weigh top and bottom, duofold upper (sleeve cut off/less bulk in arms), polar fleece pullover, Cabela's berber fleece w/wind shear liner pull over, topped with Cabela's Guide/outfitters blaze orange over shirt, light weight fleece pants under my arctic shield bibs. Muck boots with wool socks.
FDXX75