Hi Lori:

Thanks for sharing your thoughts on this. It's always good to hear a variety of input before making a purchasing decision.

Not to be argumentative ... I just wanted to point out that the listing did say:

"Weight (first things first!): 1.3 oz/square yard, including the silicone treatment."

So ... I think we can be sure it's 1.1 ounce (30D) silnylon.

At that price with low shipping costs ... I think I'm going to go ahead and get some. I'll buy some for my tarp, then post here with the results.

Again ... I really want to emphasize that I'm very appreciative of people sharing their thoughts on this and any other subject. It's good to have a thoughtful discussion of the pros and cons of any purchasing decision.

Best of luck to all with your projects!