I wore 1  pair of these for 3 days hiking on the AT.  Gross right?  No, not really, I rinsed them out each night.  They were dry by the next morning.  The weird thing is they didn't feel sweat soaked at the end of the day.  I didn't get any chaffing at all.  I bought an earlier pair of Archy's that were more like panty hose underwear, they were too hot and not very durable.  These are much better.