Hezz

In my experience the last thing you would want is a windproof base layer. The problem is that windproofness is directly opposed to breathability and the inner layers need to be as breathable as possible. The only place you want windproofness is on the outer layer. In order for things to wick vapor they need to be as breathable as possible. With the outer layer you have to strike a compromise to keep a certain amount of cold air out of the warm body layer. But it has to breath enough to let out some body vapor.