Awesome underwear for exercising at the gym. They fit snug - much firmer then what I was wearing before and they breath well. They keep their cool during a short 20 minute run and don't seem to ride up much. The material is soft and very comfortable. I still prefer cotton for my daily underwear, but I like these better for the gym or outside activities like bike ridding, golf or tennis.

They did pill up some after about 2 weeks, but not much when compared to other nylon underwear I have. Washing was a breeze and so far they are holding up great. All in all, CK is always a good purchase. Will buy more colors when available.

And for those wondering, the blue underwear in my pics is the Calvin Klein Men's Athletic Limited Edition Boxer Brief. They are the best and I do hope Amazon gets some more of them in. If not, then these FX Micro will do if they get some more colors in my size.