Wikipedia
Klivanion
The klivanion or klibanion was a Byzantine lamellar cuirass made of metal plates (scales or lamellae) sewn on leather or cloth, with plates protecting the shoulders and the back. It is said that the name derives from the Greek klivanos , i.e. oven, because this cuirass was getting unbearably hot under strong sun-light. It was part of the defensive armour of the Byzantine heavy cavalry.