The relationship between clothing and armour is as old as warfare itself. Fabric has long been used for its protective properties in practically all cultures and dates back to ancient civilizations. Even today advanced fabrics such as Kevlar and Dyneema protect modern soldiers against injury. During the Middle Ages the use of fabric for armouring purposes reached great heights. With the widespread use of mail armour, specially designed padded garments were developed to be worn underneath. This provided not only an extra layer of protection, but also padding for the mail itself. This garment, known as a gambeson but also referred to as an aketon, was a quintessential piece of military kit in the Middle Ages. Over many centuries the gambeson evolved to meet the changing nature of armour and was often combined with later plate defenses. The gambeson continued to be used as armour itself and thicker versions, sometimes referred to as jacks, were often worn over the top of a mail shirt.