Kokatat drysuit leak

  I'm lost. Too complicated. Let's just stick with a waterproof wide brimmed hat 

This page explains it pretty well.

http://andrewskurka.com/2012/breathability-its-importance-mechanisms-and-limitations/

The page makes sense. It doesn't however say anything about cool weather causing sweat to condense and not move through the fabric. Too much moisture outside is the problem, not the coolness of the fabric. I think both pages agreed on that point.

Sorry for the thread jack.