I've tried 100% cotton, and 100% synthetic undershirts, and have found this particular product to perform better than any other I have encountered.  Synthetics can present a somewhat clammier feel, and 100% cotton doesn't hug/fit as well under other garments.  This shirt, wit the right amount of cotton/spandex blend, provides the moisture.odor management of cotton under normal professional circumstances, with the unobtrusive form-fit I prefer in an undergarment.

I have been using the white version of these shirts for over a year, and have something like 10 of those.  Anytime I need new undershirts I don't have to look anywhere - I just buy these.