The mail coif protected the head, neck, and shoulders, often worn under or with a helmet.
The mail coif is a hood of riveted mail covering the head, neck and shoulders. It was worn beneath a helmet, over a padded cap, and for lightly equipped men it was frequently the only head protection they had.
It is the connective tissue of medieval head defence. A helmet covers the skull, but the neck and throat must still move, and mail is the only material available before the fifteenth century that protects a moving joint without immobilising it.
Its history runs from the early medieval period to the fourteenth century, when the aventail hung from a bascinet takes over its role and the separate coif largely disappears.
A coif is made of the same riveted mail as a hauberk: rings of drawn iron wire, each closed with a rivet, interlinked in a four-in-one pattern. Rows are shaped by adding or dropping rings, so a skilled maker could tailor a hood to the curve of a skull and the spread of the shoulders.
Early coifs were often integral with the hauberk, worked as a continuation of the garment. Separate coifs, standard from the thirteenth century, are easier to make and repair and allow the head defence to be replaced without touching the body armour.
Many have a ventail — a flap of mail drawn across the throat and lower face and secured at the temple — and all were worn over a padded arming cap. That padding is not optional: without it, mail transmits the whole force of a blow directly to the skull.
Mail is at its best against the cut, and the coif is a cutting-age defence. A drawn edge cannot part riveted rings, and a coif with a good cap beneath it turns a blow that would otherwise open a scalp or take an ear.
Worn under a helmet, it covers everything the helmet does not: the sides of the neck, the throat, and the shoulders where a descending blade lands after sliding off a curved skull. The nasal helmet and coif together are the standard head defence of the eleventh and twelfth centuries, and the Bayeux Tapestry shows the combination on almost every figure.
For lighter troops the coif was often worn alone, sometimes with only a padded cap under it, which was cheap, took up no room, and gave real protection against the most common wound of medieval close combat.
Its strengths are flexibility and coverage. It moves with the head, adapts to any shape, and covers the awkward junction between skull and shoulders that rigid plate could not span until quite late in the period.
Its weakness is the thrust. A narrow point driven with force can burst or spread riveted rings, and the specialised thrusting weapons of the fourteenth century were designed to do exactly that — which is why plate gorgets and the great bascinet's plate neck defences replaced mail at the throat.
It also does nothing against concussion. Mail stops the edge but transmits the shock, so a blow that fails to cut can still knock a man down or out, and the padded cap beneath is doing at least as much work as the mail itself.
Mail hoods are attested from the early medieval period and become standard across Latin Europe with the general adoption of the mail hauberk. Through the eleventh and twelfth centuries the integral coif is the normal arrangement.
In the thirteenth century the separate coif becomes usual, worn under the great helm, and mail remains the only defence for the neck throughout the period in which the enclosed helm dominates.
The fourteenth century ends its independent life. The aventail laced to a bascinet does the same job better, and by about 1400 the great bascinet's plate neck defences displace mail at the throat altogether, leaving the coif to survive only among lightly armed troops.
Mail construction is remarkably consistent across Latin Europe, and coifs differ more in cut — how far they fall over the shoulders, whether they carry a ventail — than in the mail itself. Regional attribution of loose mail is notoriously difficult.
Complete medieval coifs are rare. Mail was valuable and endlessly reusable, so damaged garments were cut up for patches rather than discarded, and much of what survives has been reassembled from fragments or restored in later centuries.
Surviving mail is best represented in the great arms collections, and the Visby grave pits again provide unusually direct evidence, preserving mail alongside the plate defences worn with it in a single dated context.