Origin of gambeson
Examples from the Web for gambeson
As the sole armour of the soldier, the gambeson is mentioned both by Wace and Guillaume le Breton.
The "Aketon" appears to be but another name for the gambeson.
The Hauberk, which was worn over the gambeson, was the chief body defence.
The gambeson appearing below the chausses, but covering the chaussons of mail, forming an extra protection to the knee.Armour in England|J. Starkie Gardner
Quilted garments were still worn, either as the sole defence or as a gambeson under the mail.