Armor (breastplate), uncommon
As per this adamantine breastplate magic item suit of an armor has been reinforced with an adamantine, here one of the hardest substances in an existence. However while you’re wearing it, any type of critical hit which is against you to become a normal hit.
This armor usually consists of the fitted metal chest piece worn by supple leather. Although it shall leave the legs and the arms are relatively unprotected, this armor is provide good protection for a wearer’s vital organs while it is leaving the wearer relatively unencumbered.
Notes: Immunity: Critical Hits, Combat, Warding