Marlboro was originally marketed as a woman's cigarette in the 1920s but was repositioned in the 1950s-1970s to target male smokers as concerns about the health risks of smoking grew. The brand hired Leo Burnett to develop a new "Marlboro Man" cowboy image promoting masculinity and independence through magazine and billboard advertisements. This successful repositioning transformed Marlboro into the top-selling cigarette brand in the U.S. by targeting men seeking a more "macho" cigarette, though the real cowboys depicted later suffered health effects from smoking.