Thanks Bob. Since my last post on this topic, I have tried plastic bags twice just to start working on it. I wore them right on my feet with no liner (didn't have one) and of course it felt nasty, which I got used to, somewhat, but a sock liner is obviously needed. In the past liners gave me blisters (even though they are supposed to prevent them). But I'll try your formula next.

One problem, because the plastic bag is slick, it caused my foot to slide more easily than normal into the toe box, and I kept having to avoid toe bash walking down hill. I cranked the laces tighter, but that caused general foot pain. A friend purchased some VBLs for the feet, maybe they have a cloth-like texture that prevents the foot slithering forward. Any more words of wisdom?

Any words on using full-body VBL in the sleeping bag? Experiences? Products?