ok here is the deal,
the "wife beaters" is the regular tank tops, the REAL tank tops should show more of your back, the ones that muscle mag people would use !!! it feels more "open" and is ONLY used by people who have muscles because if skinny people use them, it just doen't look right

so if you are skinny, use the wife beaters

if you are buff, use the REALL stuff, if you buff people use the wife beaters, you will see that the "wife beaters" doesn't fit as well because either your shoulders or your arms are to big and would need the REALL tank tops. (i know because i had problems looking for REALL tank tops !!!