The underwear are all synthetic and comfortable to wear. They are moisture wicking, claim to be anti-bacterial, and anti-stink I guess as well. None of this matters to me on a practical level, but I can say: they don’t seem to get stinky, not that I’ve gone in for the sniff.
I’m so glad Ben writes about stuff like this. Packing five to seven pairs of underwear is such a waste of space. Can’t wait to try these out.