Wind proof mid layers?

[BAK]

Yes, LOL, you do still need something to protect the wind barrier.

I just hear so many guys talking about how many layers of wool they put on, yet have nothing to keep the wind from sucking the warm air layer away from their skin.

[tecum-tha]

Depending where you hunt, one normally needs a "wear layer" on the outside. The wear layer can be camo, needs to be quiet and have pockets for immediate access. I normally use a poly cotton jacket fir that. Does not pick up sticker burrs, protects the more delicate insulation layers underneath. Windbreaker should be worn right below the wear layer. Than as many insulation layers as you require.
Mountain loden fabric is windproof to at least 50mph Wind. It is traditional German/ European hunting clothes fabric. It is also highly water resistant.
It is not cheap like blanket wool, but not excessively expensive. Right around $42 a yard and about 4ft 8" to 5' wide.
Loden Friedl in Bavaria for example.70% sheep wool and 39% Alpaka.

[Orion]

I've worn wool outer clothes for a lot of years, and still do when it's not windy.

By putting a wind blocker under the outside layer of wool, one still has the quietness of wool, but the insulating value of the outside layer is pretty much lost in a wind.  
 
My first and, when needed, second layer from the skin are always wool to take advantage of its excellent insulating value.  

But when it's windy, I switch to synthetic wind blocking outer clothes

[Covey]

I layer in this order.
1. Base layer ( soon to be merino wool hopefully )
2. Some goodwill wool I picked up  
3. a wind blocker top and bottom ( still looking for that one )  
4. Surplus camo outer layer.
As you all can tell, I’m cheap! I cannot get myself to pay five hundred dollars for hunting clothes. Everything I have probably cost less than a hundred bucks.