Here's a link to a guy selling 2 colors of 1.3oz 30d sil-nylon on ebay. I have made two tarps from the gray kind. The gray has 2 small lines down the edge about 1/8" in, other than that it would be 1st quality IMO. I just ordered some of the kelly green and will report back on it's quality. I'm not affiliated with this guy, I'm just a regular customer of his. Check out his UL backpack he's designing, it's pretty nice.