Like others I'd be interested in learning more about this micro-light nylon fabric.
I have made a differentially cut under-quilt whose hammock side is made of 0.33 oz/sq yd cuben. Doesn't breath---that's one of the attractions actually---keeps all body moisture out of the down. I'm thinking about making another that is almost all lightweight cuben, except for some strips of breathable nylon to let air in and out. Last year I did some small scale experiments that verify such an approach ought to work, and later I saw this web-page describing an over-quilt that does exactly that.
??????????????????? Never mind; I had so many tabs open I didn't notice another one pop up when I clicked on the link. At least, I think that's what happened.