I find dressing in layers and keeping body moisture down is a big help, with that said, my outermost layer is goretex, whether its raining or not, because it cuts any wind to zero, (Windshear also works wonders with wool), I then have a down liner for my goretex coat.
I believe the coat is a 10X and it has a camo velvet type finish for quietness.


1 Goretex and down
2 Windshear and wool
I use 4-5 layers on the stand for my upper core, and typically only 2-3 on my legs.