Buy as many pairs of these as you can afford.  I bought one pair at a bass pro shop in LA and I was hooked. Yes they are expensive but they don't: bind, cut in, chafe from sweat, and can last several days without their unwashed nature being noticed.

As an experiment I washed them in the shower wrung them out and wore them wet under my pants in the south. It was 90 degrees outside and they stayed cool for about two hours then dried. Which was very nice. My girlfriend thought I was nuts and told me so regularly.

So I bought 4 more pairs. One boxer, one brief, and two boxer briefs. The 80$ took some consideration and courage but they are that good.

A side consideration: I bought them in all colors but white. Don't buy white underwear you plan on wearing for days and washing in the sink. Ha ha.