I will cut you a 36" X 84" piece of tyvek for $10 shipped. Weight is 4.8 ounce. This is from a tyvek banner roll used by artist to protect expensive artwork when shipping. It is similar to tyvek house wrap but does not have printing (all white). I believe house tyvek would weigh 4.3 ounce but I have not weighed to confirm. If interested shoot me a PM.