It is ideal headwear for an era of short hairstyles and is an item of what would now be called street fashion which can be adopted at little cost by groups of girls.
The Brow-band, which when it appeared at the end of the Great war was little more than a hair ribbon, developed into the Bandeau.
The Bandeau was basically just a wider version of the browband. In fact a slightly widened browband was worn by those, who perhaps saw the Bandeau as too ostentacious

The influence of the Women tennis stars of Wimbledon contributed greatly to the popularity.

.