Aventail

An aventail (/ˈævənteɪl/)[1] or camail (/kəˈmeɪl, ˈkæmeɪl/)[2][3] is a flexible curtain of mail attached to the skull of a helmet that extends to cover at least the neck, but often also the throat and shoulders.

Some featured a ventail (a mail flap next to the mouth), which could be laced or hooked up to cover the lower face, or left loose for easier breathing or speech.

Archeological finds of complete aventails from the early medieval period are however sparse and more than often only a few perforated attachment holes remain.

Early aventails were riveted or otherwise fixed directly to the edge of the helmet, however, beginning in the 1320s in Western Europe, a detachable version replaced this type.

By the dawn of the 15th century, the plate armored neck guard (gorget) of the Great Bascinet started to replace the aventail.