Nat Gear had a snow pattern that incorporated black "squiggles" for lack of the appropriate term onto the white field. I feel that any white clothing would do, and just add a few blasts of black spray paint to imitate the shadows found in nature.
The problem that I see with Tyvek suits, having worn them for work in abatement situations, is that they don't breathe, so you will sweat, and you don't want that in winter, and two, they are noisy, in dead silence, any movement sounds like 10 bags of Doritos getting dug into by hungry 8th graders!
Thank you, and all of our Veterans here for your service to our country. That does look like a great winter garment, I love the long length to give extra protection to the lower back/kidney area.