The only requirement that I would have is that everything I ware is warm (made of wool) and large enough so I can sit still for long periods of time. The old red & black jacket is great. The dark brown paints (wool) are fine, and a watch cap is a good idea. The boots should be loose and I ware wool socks (I would have an extra pair with me). A glove on the trigger hand, and a mitten on the other. I'll have rain gear in my pack.
Of course this is base on my own opinion, because
I don't hunt...