The wrap dress, a popular silhouette today because it is flattering to so many figures and accommodating to a fluctuating size, got its start in the 1920s, when hemlines went up and the heavy structural garments that had been a part of women's clothing for not just decades but centuries went away. The wrap dress was just one of many fashions to come out of the flapper
era and was a celebration of women's free movement. But more than being part of the outrageousness of the time, the wrap dress was deeply practical, being easy to construct and not needing to be fit precisely.
Diane von Furstenberg is widely credited with bringing the wrap dress back to
modern fashion in a trend that has now lasted more than 30 years. She highlights how easy the dress is to wear and the way it echoes more traditional garments from kimono to togas. The kimono comparison is particularly apt; the 1920 were mad for all things Asian in fashion, hence the wrap dress's initial success.
Since then the dress has found succes for any number of reasons -- it's quick and easy to put on, but looks great, thus accommodating the modern woman and her very busy life and is just as easy to take off, a real bonus in a society that is relatively nonrestrictive about women's sexuality.