I bought these to use as undershirts for the warm Texas climate.  These DO NOT seem to follow the same sizing as the Hanes comfort fit cotton undershirts.  The cotton large is nice and snug like an undershirt should be while the DRI-FIT version is way to large in all aspects.  The sleeves are too long as is the overall length of the t shirt.  I cannot wear them under any short sleeve shirts and could wear them just as a t shirt.