A hauberk is a shirt of mail. The term is usually used to describe a shirt reaching at least to mid-thigh and including sleeves. […]
The word hauberk is derived from the Old Frankish word halsberg (c. 1300),[1] which originally described a small piece of mail that protects (“bergen”, literally “to give protection, to save, to rescue”) the throat and the neck (the “Hals”).
The short-hemmed, short-sleeved hauberk originated from the medieval Islamic world[2]
Source: Hauberk – Wikipedia
Tim B.
https://en.wikipedia.org/wiki/Mail_coif