Bonnet was initially a generalized term for various kinds of headwear for both men and women. However, most times, the term Bonnet is used to referring to a head covering that doesn’t cover the forehead but covers the back of the head completely. It is tied around the chin using a chinstrap.
At times, bonnets also had a stiff brim that would protrude from the edges of the cap. Its main purpose was to protect the hair from the wind. Bonnets were decorated with laces, bows, ribbons, and many other decorative objects.
Paris even produced a variety of straw bonnets that became very popular among the women of the time.