The hauberk was a mail shirt, often reaching to the thighs or knees, that formed the core body armor of many high medieval fighters.
The hauberk is the mail shirt: a knee- or thigh-length garment of riveted rings with long sleeves, the principal body defence of the European warrior from the eleventh century to the thirteenth. Where mail is the material, the hauberk is the object.
It represents a very large investment. The labour in twenty thousand riveted rings put a hauberk beyond most men, and its ownership is one of the practical markers separating those who fought as a profession from those who were summoned to it.
It is also the garment that defines the visual identity of the high Middle Ages. Almost every armoured figure in the Bayeux Tapestry wears one, and the image of a knee-length mail shirt over a padded garment is the standing picture of the eleventh-century warrior.
The body is a tube of mail, widened at the hem and split front and back so the wearer could sit a horse without the skirt binding. The split is a riding feature, and its presence in an image is a reasonable clue that the wearer was expected to be mounted.
Sleeves lengthen through the period. Early hauberks stop at the elbow; by the twelfth century they reach the wrist, and the most complete extend into integral mail mittens with leather palms, which could be left hanging when the hands were needed for anything but fighting.
Many earlier hauberks include an integral coif, so head and body are one garment, and some have a ventail — a flap drawn across the throat and secured at the temple. From the thirteenth century the coif is usually separate, which makes both pieces easier to repair and replace.
Worn over a padded garment, the hauberk covers the torso, arms and thighs against the cut — the great majority of blows in close combat. Its weight, generally in the range of ten to fifteen kilograms, hangs from the shoulders, and a belt at the waist transfers part of it to the hips.
It defined what a charge could survive. The Norman cavalry at the Battle of Hastings in 1066 fought in hauberks against a formation of axes and spears, and the tapestry shows both the protection and its limits — mailed men are shown falling as often as prevailing.
On crusade it was tested against archery in a way European fighting rarely managed. The accounts of the Battle of Arsuf in 1191 describe crusaders advancing under sustained shooting, and the survival of men whose mail was thick with arrows is one of the period's more striking testimonies to what the garment could absorb.
Its strength is complete, flexible coverage of the body's core in a single garment. Nothing else available before the fifteenth century protects so much of a man while leaving him able to ride, climb and fight without adjustment.
Its costs are heat and load. The weight hangs from the shoulders and the padding beneath traps heat, and accounts of campaigns in Syria and Palestine are full of men suffering badly in mail under a summer sun — a limitation the equipment could not design away.
Its vulnerability, as with all mail, is the thrust and the blunt blow. A spear driven hard, a war hammer, or a fall from a horse could disable a man whose rings never parted, which is why plate reinforcements appear first over exactly those areas most likely to take a concentrated hit.
The hauberk is well established by the tenth century and becomes the standard of the mounted warrior across Latin Europe in the eleventh, spreading with the same social changes that produced the castle and the mounted retinue.
Through the twelfth and thirteenth centuries it grows more complete — longer sleeves, integral mittens, mail leggings worn with it — reaching the fullest coverage mail alone ever achieved at roughly the time of the Battle of Bouvines in 1214 and the Battle of Las Navas de Tolosa in 1212.
The fourteenth century converts it from principal defence to foundation layer. Plate is strapped over it, then a coat of plates or a breastplate covers the torso, and by about 1400 the hauberk has become a shirt worn under a harness rather than the harness itself.
Complete medieval hauberks are extremely rare. Mail was too valuable to discard: damaged garments were cut down for gussets and patches, so the archaeological record consists overwhelmingly of fragments and the museum record of composite pieces.
The Visby grave pits are again the exception that proves the rule, preserving mail in a dated context alongside the coats of plates worn over it, which is what makes that assemblage disproportionately important to the study of the whole period.
Regional differences are hard to pin down because the fabric itself is so uniform. What differs is cut — the length of the skirt, whether sleeves end at wrist or mitten — and that is known far better from images and effigies than from surviving garments.