Since it's been a couple of days with no first hand responses, I've got a second hand one.
There's a brand, en femme, that does a poly/lycra blend that is pretty much the default for a couple of people I know. The fabric is designed to wick and dry quickly. Thing is, the people I know that have undies by en femme are more gym/yoga oriented than hiking/outdoors, , so it may not be right for that, comfort wise.
I know the polyester part isn't what you asked for, but when the fabric is made right and blended it can actually work right. Some of my shirts back when I was lifting a lot used a poly/lycra blend, and it really does wick very well, which is key to staying both cool and not giving odor a chance to set up shop. But that may not apply to undies for hiking, so I'm not certain if it would fit your needs.