I am planning to make bivy to pull over my hammock, and would like some advice on a WPB fabric to use here. Its not a jacket, so i dont need it to be superbly breathable, my emphasis would definitely be on the waterproofness of it.
The idea is a a tube with drawstrings on each end, no zippers. Like a Molly Mack hammock sock with a few tie-outs to a ridgeline to give me some breathing room. I don't plan on using a tarp….the point is to avoid that entirely.
I am considering making the foot end of the bivy out of something non-breathable, probably just a solid sil-nylon. So silnylon on the bottom, and something else on top.
Any suggestions on what to use and where to get it would be much appreciated.

