Mario thanks for the advice! So thinking like multiple base layers on top of each other? Versus multiple mid layers, like a fleece and a down puffy. I'm coming from 16 years in the Florida Keys, gonna freeze my ass off. So the layering concept is all new to me. I've seen youtube vids with some simple 3 layer setups, and then some with two or 3 mid layers.
I was gonna ask that next, is that because of the waterproofing? I've seen "waterproof" and non waterproof down puffy jackets. Do you need waterproof or is the waterproofing from a good shell with powder skirt enough?