Filson is great stuff. I've not shot a bow with one of their items on, but use it for other pursuits.  For weapons where getting spitting close isn't an issue, I just put my wind layer right over the top.  Like old army issue Camo tops and such.  TOASTY

One item I can say is ridiculously warm is chucks two tracks wool vests. Once you see how they are made you would be hard pressed to find a better wool vest for warmth.

Wool blocking the wind is a density of weave issue. While I sell Asbell wool, I wear wool from literally every where. I have different weights and densities.

Fortunately, all wool improves it's density over time. Unfortunately, it's actually an action of slight shrinkage. Yep....get your wool wet enough times, and it will be dense as heck. This is called "fulling" Thats why it is important to dry your wool properly...laying it out and blocking it as it it dries.

I find Filson to have an extremely dense and windproof wool right from the start. My Filson Mackinaw gets the nod when I am going to just wear  one coat, and a bowhunters mobility isn't required. It's great gun hunting or checking coyote traps. But I can't shoot a bow with it. I wear a ton of Filson wool, but other than their sweaters and vests,it is not bowhunting gear.

Asbell wool is designed to be layered. It's roomy enough for a jacket, a windblocker vest, and maybe an extra Asbell wool vest. I also always wear my thick Filson sweater. I wore this arrangement this morning. 18 degrees, blowing snow, and I was never cold. I sat 3 1/1 hours and could have lasted another 2. Asbell pullovers and zippered jackets are also specifically designed for the bow hunter. Seems like an easy claim, but hear me out.

There are lots of Mackinaw "like" jackets out there. Filson make the best one, IMHO. But these are designs that originated with timber cruisers and gun hunters. Lots of pockets, usually extra wool around the shoulders, etc. Frankly, I think it's the best looking jacket out there. I have worn mine from funerals to traplines. But with all that bulk and extra wool, pockets and buttons, come problems for the bowhunter.

Teresa started her business with the pullover. It was designed to keep a bowhunter warm, concealed, and without the geegaws on it that cost extra $$ and snag bowstrings. Teresa and Fred sold nothing but pullovers until last year, when they added zippers. Seems like a simple thing? Nope. Teresa agonized about zippers....not wanting to increase cost, and not wanting to cause bulk and string catching pulls to the front of the jacket. And it isn't as simple as splitting open a pullover and adding a zipper. The pattern changed. Subtle as it seems, it took quite a bit to get the zipper "bowhunter approved". The shape of the body and the "flow" of the arms are different than other jackets....they are designed to accomodate the hunting archer. Thankfully, Teresa is married to a bowhunter who knows what works.      

Other wool that is obviously designed for the bowhunter is 2 Tracks and the Grey Wolf products. Great stuff. I will be ordering a 2 Tracks for my personal use soon.

I love my Asbell wool garments. But...if you're worried about the wind, get some wool felt from Two Tracks. Chris is an artist with this material. Peace!

I own a variety of wool garments several Asbell products, Woolrich, Pendleton, vests, jackets, and several Merino wool sweaters for layering.  With wool it all depends on the tightness of the weave, Filson, Pendleton, KOM etc all use a very tight woven fabric usually 100% wool and very thick! hence the price, that fabric is very pricy to manufacture! The 85/15 blend is more open weave hence the wind tends to pass thru it, I usually layer with fleece or Merino garments anyway so for me its not a problem, but wool will absorb snow etc but it will keep its warmth only get heavier! I love all of mine and the Asbell garment are some of my favorite patterns! I recently acquired a Burton 100% Boiled wool jacket that I have been layering with my Asbellvest so its been my fav combo for hunting this December!

I have the swandri and I get mine lanolin treated every couple of years. I did that to my camo Filson double mac and that made it more wind proof. Perhaps too wind proof, considering the Filson longjohns, Filson wool shirt, possibly a Norwegian wool sweater and Filson wool vest that are under it. If one really wants to get warm, as in you cannot melt snow when you take a nap on a winter day, put a Duluth Pac canvas anorak over it all. It is hard to beat a heavy wool pants and longjohns under a waxed canvas insulated bib overall. It has to be zero or colder for me to break all of this stuff out at the same time.

pavan,
I like your layering system.
I need to get a good wool vest yet.
My system for the zero to 15 above range is similar.
I start with merino long johns, wool shirt, Asbell wool pullover and finish with the wooltimate stuff.
As I say, I am missing the vest and I need to look into your suggestion of the Duluth waxed canvas.