For example, the 1920s was the age of modern travel. New inventions such as the automobile, motorcycles and the aeroplane influenced the fashion at the time. Elsa Schiaparelli designed flying clothes for women. We also associate the 1920s with the 'flapper' dress, a loose, drop waisted, short dress, named after the young liberated woman who wore the style. The constraints held over women in the Victorian era were disappearing, now they smoked and drank and wore their hair in a very short style, blurring the once strong line between femininity and masculinity.
1920s advertising poster
The question is which fashion designers would we think as 'modern' today? I think it would be designers that are using hi-tech, cutting edge technology. Mary Katrantzou is famous for using digital print in her designs, and Hussein Chayalan is always ahead of the game with his LED and convertible dresses.