I have been guiding canoe wilderness trips in the BWCA since 1990 and NEVER found more comfortable or suitable underwear. We were hit by thunderstorms our second day of a six day trip and had rain at least half of the trip.
I bought 4 pair "just in case" but two pair have never been worn. I alternated between the two pair washing one in the river when I bathed and hanging them to dry before hitting the sack every night. Even with the rain, the "spare pair" were always ready to go by morning.
I am thinking of switching to these for every day wear. If you have ever had to deal with "heat rash" or those other nasties, you will appreciate how well these babies breath. I give 'em a 5 star rating!