Boas have been documented as an adornment since at least 1820, but might have been worn as early as the 17th century. Wtih the reputation of being elegant as well as campy or vulgar apparel Boas have fallen in and out of fashion.
Boas were in style or trendy during the late Victorian Era and Edwardian era (between 1890 and 1915), the 1920s, the 1970s, the late 1990s, and into the early 21st century