What is chain maille exactly? Well, according to good ‘ol Wilkipedia:
“Mail or chain mail is a type of armour consisting of small metal rings linked together in a pattern to form a mesh.
The word chainmail is of relatively recent coinage, having been in use only since the 18th century; prior to this it was referred to simply as mail.
The word itself refers to the armour material, not the garment made from it.
Mail was a highly successful type of armor and was used by nearly every metalworking culture in North Africa, Europe, and Asia. Its use spans from around 300 BC to the dawn of the 20th century and beyond, a period of over 2500 years. Today it remains in limited use in stab vests and a number of other applications. It is also used in reenactments, decorative uses and jewelry.”