Some more research on Tarp!!!

http://www.tarptent.com/shipping.html

http://www.answerbag.com/q_view/1979758

http://www.tarptent.com/

http://www.tarpsplus.com/learntarps.html

http://www.patagonia.com/us/patagonia.go?assetid=37606

both polyethelene tarp and Nylon tarps are good because they are both recyclable.