Bascinet
A steel helm from the 14th century.
The bascinet could be open faced, or visored.
When worn with an open face a Great Helm was sometimes worn over the top for additional protection. This could then be discarded for better visibility.
A common visored style was the Pig-Faced bascinet
Brigandine
A brigandine (sometimes spelled brigantine). also called a brigander, is a form of body armour, in use from the late Middle Ages. It is a garment typically made of heavy cloth, canvas, or leather, featuring small oblong steel plates riveted to the fabric such that the fabric and rivets were present on the outside, sometimes with a second layer of fabric on the inside.
Chausses
Chausses were a medieval term for leggings, which was also used for leg armour; routinely made of mail and referred to as mail chausses, or demi-chausses if they only cover the front half of the leg. They generally extended well above the knee, covering most of the leg. Mail chausses were the standard type of metal leg armour in Europe from the 9th to the early 14th centuries CE. Chausses offered flexible protection that was effective against most hand-powered weapons, but was gradually supplemented and then replaced with the development of iron plate armour for the legs in the second half of the 13th to first half of the 14th century
Gambeson
A gambeson (also known as, or similar to where historic or modern distinctions are made, the acton, aketon, padded jack, pourpoint, paltock, haustement, or arming doublet) is a padded defensive jacket, worn as armour separately, or combined with mail or plate armour. Gambesons were produced with a sewing technique called quilting or pourpointing that produced a padded cloth. They were usually constructed of linen or wool; the stuffing varied, and could be, for example, scrap cloth or horse hair.