The Armour of Caledor grants the wearer a 2+ armour save that cannot be improved by any means. In addition, the Armour of Caledor grants the bearer a 6+ ward save and the Fireborn special rule.
Source: Warhammer Fantasy: 8th Edition
The Armour of Caledor grants the wearer a 2+ armour save that cannot be improved by any means. In addition, the Armour of Caledor grants the bearer a 6+ ward save and the Fireborn special rule.