The most common pattern of linking the rings together is the 4-to-1 pattern, where each ring is linked with four others. Historically, the rings composing a piece of mail would be riveted closed to reduce the chance of the rings splitting open when subjected to an attack. In the beginning, European mail was made of alternating rows of round riveted rings and solid rings. By the 14th century, European mail makers stopped using solid rings and mail was made from wedge riveted rings only with no solid rings. Contrary to depiction in most media, the mail coif was never placed directly on the skull, but onto a thick shock-absorbing padding made from leather, textile, hair, etc. Increased
thermal insulation led to faster overheating of the wearer, which was of major concern for armoured combat. By the late 15th century, the
aventail had replaced the mail coif completely. An aventail is a curtain of mail that is attached to the skull of a helmet. The mail extends to cover the throat, neck, and shoulders. == Etymology ==