let's agree that we will perhaps never completely agree. <img src="/forums/images/graemlins/smirk.gif" alt="" />

My own experience is that under some circumstances, a slight breeze can be felt through the membrane. That's not a guess, that's a fact.
I'm not saying it's enough to get chilly, I'm just saying that tiny amount is enough to enhance breathabilty a bit. and every bit counts for me.

I've read all the articles you've read and checked out all of the online resources available.

That's a very bold claim. <img src="/forums/images/graemlins/laugh.gif" alt="" />