Originally Posted by bernmart
What also works is the material Fedex envelopes are made of. It's very light, and impervious to wind and water--especially wind. I cut one of their larger ones on three sides, trimmed it, and it functions perfectly as a windblock. And it folds to almost nothing. It won't insulate like newspaer, but it's better against wind.
That material is Tyvek, basically a moisture barrier commonly used in home construction. You can get them in huge rolls from Home Depot. You can find cycling jackets made from this material as well.