Definition & Meaning of "gambeson"

What is a "gambeson"?

A gambeson is a padded jacket worn as armor during the Middle Ages. It was usually made of quilted linen or wool and was used to absorb shock and prevent bruising and injuries during battle. Gambesons were a common form of armor worn by knights and soldiers and could be worn on their own or under plate armor. They were often decorated with embroidery or other embellishments and essential medieval warfare equipment.