I own quite a bit of Icebreaker clothes that I use for running and it's always great stuff. Just got this top and I expect it to perform just as well as everything else Icebreaker as far as temperature and odor control, which is excellent. I got a size small and it's true to size and fits well, but I don't think it's quite athletic fit as claimed (compared to the size of some of their base layers).
I'm guilty of some times accidentally putting some of their underwear or thin tops through the dryer, so some of my thinner Icebreaker garments have developed holes within a year or two. So, be careful and keep this out of the dryer!