Read the information @ www.wiggys.com regarding Goretex. Aside from my belief in Wool's superiority ( especially the "smart wools") It has a forgotten advantage. I can easily mend a wool sock with cordage. I can even create cordage by unravelling a sock. A sock can be improvised into a filter medium ( preferably unworn) and can even provide emergency tinder. All this at a price I can afford to carry extra pairs for their primary use.