This is not an entirely new concept to me. But the effectiveness, products, techniques, etc is.
I am a big sweeter. I mean I can get drenched from my own perspiration even in the coldest of temperatures. I've learned to deal with this, to some extent, with effective layering. Often times wearing the lightest of base layers with a wind shirt top. When I stop I immediately don a parka to stay warm. This works, but leaves me with wet base layers. These have to be dried on multi day trips. Workable, but certainly not ideal.
So, is vapour barrier clothing something worth looking into to for winter treks? Does anyone use this technique? What products are worth looking at? What, if any thing, is the down side?

AATIA