Big bill wool pants, and a nice wool shirt. With a synthetic underlayer (synthetic will wisk the sweat away).. Knee high wool socks. If you need more then that add a jacket. I've switched to Wools for winter and late fall. Then for spring and summer, early fall I'll be wearing a base layer of merino wool, and synthetics on top.
I got a cheap but Brand new in bag surplus Canadian army wool shirt from army issue surplus. Some surplus Canadian army polypro under layer, that has worked great, and a few pairs of the army issued knee high socks. I added a pair of Big bill Wool pants from gostwear and it's been the warmest I've been in a few years while out. I literally don't plan on buying any more camo clothing. From now on it's wool, and if I need extra concealement I will put a leafy suit over the top.
The nice thing about wool is it naturally doesn't smell. It's really durable. It sheds water up to a point of saturation, but will keep you warm even if soaked. It keeps you insulated well. It's silent and it does not make noise like a lot of the synthetics do when moving. And it will last a long long long time as long as your not putting it in a dryer or shrinking it by mistake. If you want to clean wool, get a size bigger then needed, and cold tumble in washer with no fabric softener. Hang Air dry, but I wouldn't recommend that on items with zippers. Normally though it's just dry clean.
Since changing to this system I don't ever plan on going back to what I was doing before. Which was buying cheap camo pants and jackets etc.. at places like cabelas or Canadian tire. Then just layering clothes that would fit underneath, like a pair of jogging pants, some long socks, and like 3 or 4 shirts. I was cold and it was too much stuff. Now that I'm just wool socks, poly underlayer, sometimes 1 shirt, then my wool shirt on top. It's been easier to manage, the cold and I now deal with bringing less clothes with me.
Army suprlus thread on the wool shirts:
https://www.canadiangunnutz.com/forum/showthread.php/1625843-Canadian-made-heavy-wool-shirt
This guy knows his stuff, I learned a lot from this video.
[youtube]bGs0cqwJh8E[/youtube]
Another good video
[youtube]dBWF8O5c-Qs[/youtube]