Covert Vests (often called undershirt) offer discreet protection whist enabling the wearer to retain their choice of appearance and presentation.
Anyone who’s occupation might lead a confrontation should consider this option if an “official officer” look is inappropriate.
Volatile situations can arise without warning in situations where officials of business and social  service must discuss or confront an issue with a person who is likely to take offence.

Stab Vest, Stab Vests, Stab Proof Vest and Stab Proof Vests are common terms for body armour with a defined level of resistance to a knife or pointed weapon. The same also applies to bullet proof vest terminology - bullet proof vests have a defined level of ballistic resistance.