tomAZ, this is totally a situational question and you know it. it depends on who you are in the office pecking order and also on the time of year. i've seen stockboys straight FIRED over this type of shit. so let's break it down. v-necks are never really APPROPRIATE but you could wear one as long as no one ever actually SEES it. but you should really be a man and wear an A shirt instead. crewnecks are okay under collared shirts but you should REALLY BE A MAN AND WEAR A GODDAMNED A SHIRT. fucking nancy boys. fucking poofts. crewnecks are perfectly acceptable underneath a SWEATER, but then you should really be a man and wear that sweater with a collared shirt. my own personal rule of thumb in regards to this is to do whatever the BOSS does in relation to VISIBLE undergarments, but then do it with ten times more dignity and style and aplomb. you want his job don't you? i mean don't you? what the hell are you doing over there typing on a message board during goddamned WORK hours for anyway? you should be plotting blackmail or bribing his kids for hot gossip on his failing marriage or something. get with it, tomAZ. get you some. YEAH.