My material just came in. I got the nylon taffeta and nylon supplex. The taffeta has a DWR finsh and the supplex is supposed to be WPB. It looks like it would be waterproof. I'll test it out later. The supplex was labeled as seconds with a streak, but I can not see anything wrong with it. I have not weighed them yet. The supplex looks to be a little heavier or at least stiffer than ripstop. For $1.50 and $1.25 a yard, it was hard to go wrong. The only down side to the supplex is the dark purple to plum color.
I am going to put aside my current tarp project and make a hammock and travel pod. I'll post pics when done.