1. I did do research. I know what MLD and Integral Designs are making, and I know Zpacks makes split bivy's with a water resistant top and a bathtub bottom. I also know there's a sea of bivy's from non-cottage companies and all use independently developed fabrics touted as "breathable." I have no idea which stand out.
2. I read the entire most recent thread on bivy breathability, but it's much older. Every company seems to be launching redesigns this spring, I have seen new tents from three companies alone, and new sleeping bags from one as well.
3. Unhelpful is assuming since you yourself found out over the course of a few months or years, I must have too, and otherwise, I have failed to do enough on my own. Agree with everyone calling a few users out for being snarky- save it. At the risk of sounding cocky, the amount I contribute to other people when I have good info earns me the right to shortcut straight to the experts once in a while.
Now, in case I'm being unclear...
What I'm looking for is to know
1. Which fabrics are Water-Resistant/Breathable and which are Waterproof/Breathable. I know Pertex is the former and Goretex is the latter, any other examples worth knowing about? I'm fairly certain I want the former, since I'm using a tarp. I want the bathtub waterproof bottom (hopefully tough stuff) and a nice, light, water resistant top for wind spray and bugs. And good netted venting so I don't condense all over myself.
2. What are the low-weight options that fit what I'm looking for, in either the WRB or WPB category?
3. Anything I'm wrong about philosophy-wise when it comes to a bivy. I have never used one. Maybe I need more than I think for sleeping in storms. Remember, this is a New England storm camping kit, up to 50MPH gusts (The trailstar goes to 60mph).