Pixane

The pixane collar tightened again, and I yanked at it, needing more air than it would allow. “I wouldn't worry,” Sir Wynn said.

In addition to his horse, a knight's other important equipment was his armor. […] he might also wear mail gloves (mitons), leggings (chausses), and a hood (coif) or collar (pixane) to complete his ensemble.

2019, J. R. Tomlin, Noble Traitor: A Historical Novel of Scotland, Albannach Publishing As Kirkpatrick sorted the armor, they could hear the increasing hubbub of the crowd. […] He pulled on his mail coif, and Kirkpatrick helped him into the pixane that added protection to his neck and upper chest.