DanO
By "vapor barrier" do you mean they are the "plastic coated" kind of coveralls?

They may keep rain out but would keep your perspration in. And would be noisy walking in, esp. rubbing against brush. If an animal hears you coming he doesn't have to see you he will be gone.

If I had to choose between quiet hunting cloths and camo hunting cloths I'd pick quiet every time. For big game and varmints anyway.

Have a good one!

Robin in Rocky