I've used these around town, in the gym and on the trail:
"Diamond-knit 93% nylon/7% spandex for lightweight stretch and support
Wicks away sweat to keep you drier, cooler
Antimicrobial treatment to stop stink"
quick dry, not heavy or overly warm at all. While traveling, I can wash in a hotel sink and dry them overnight. At $24 each, they aren't expensive like outdoor and high-performance sports wear. Duluth Trading does quality work clothes, mostly, but some of their synthetic undies and shirts have BPing applications.
Their trademark cotton t-shirt promises to end "plumbers butt" by being 3" longer. Those of us with Irish ancestry (short legs, long torsos), find them handy even when not swinging a pipe wrench under the kitchen sink.