The best windshirt is the Paramo Fuera Smock. Once you use a wired, roll-away hood, you will never buy a shell without it. The high collar that can zip up over your chin is great.
The fabric, unlike similar Patagonia, Marmot, etc., is not calendered and does not have any coating. It is a simple, tight weave. It has the best drape of any of the fabrics used in windshirts as well and minimizes noise.