I am an adidas guy, and I really wanted to love these, so it pains me to write this.  These briefs look great.  They feel pretty good too--not too tight, but still plenty of support.  But they do the EXACT OPPOSITE of what they are suppose to do--they TRAP HEAT AND MOISTURE.  Even if I am not sweating, I will be literally WET underneath these things.  There is no wicking or cooling action whatsoever.  This last weekend backpacking was the last straw.  I put on a NEW CLEAN PAIR to go to bed.  It was a cool night.  I still got SO HOT and SO WET underneath these briefs that I had to take them off to get to sleep!  I can't make myself return underwear, but I really want to cause this is a horrible product...