Each decade seems to have it's defining fashion. The trouble with being fashionable is, when something goes out of style, it really goes out of style.
Bell bottoms were very cool in the 60's, but when the fad died out, you looked like a real dweeb if you still wore them.
At any rate, people were asked which decade had the coolest clothes and the 60's won by a pretty big margin.
Here's how the other decades rated.