Last week, I learned of an important product called performance underwear.  Made out of material similar to that of Under Armour products, performance underwear is meant to dry quickly and ... well, that's really it.  They probably claim to "wick moisture away from the body", but I'm not sure I believe that.  I wore them while hiking some trails around Mount Saint Helens, but I can't really say I noticed a difference in "performance".  I still huffed and puffed while walking up steep hills, and I still sweat like a pig (do pigs even sweat?).  All in all, I wasn't too impressed with this idea of "performance" underwear, but I do like the idea that they're quick drying.  That way, when I'm hiking through the woods on a 90-degree day and I'm covered head-to-toe with sweat, at least my underwear will be dry.