@KLF - Perhaps I misinterpreted this but, from the havelock site:
“Wool prevents condensation by generating heat from energy, making it warm when wet.”
And from some other research (Science of Wool ... Some of the reasons why wool outperforms! – WeatherWool)
“Inside the wool fiber, water vapor binds to the cortex, producing the heat of adsorption . Again, all adsorption is exothermic …heat generating.”
So maybe it does generate some bit of heat?