Originally Posted by
David Henderson
3. keep your clothing wet (in particular your hair on your head (if bald, a dew rag can hold water), jersey and front panels of shorts. Water conducts (transfers) heat 25 times more than air; evaporation removes the heat that has been captured in the water. This is a really big deal for cooling. As an illustration: Tests done with canteens covered with water soaked fabric covering versus canteens with dry fabric covers produced a 42 Fahrenheit degree difference of interior water temperature (23.4 degrees Celsius difference).
evaporative cooling effects on water containers.
That's more than I would have thought, good to know.