Body armour is an item that can be researched by the Chief for $1000.
Once unlocked every Guard, Armed Guard and Dog Handler will go to an Armoury to equip themselves with body armour. Wearing it will increase their toughness by 50% and decrease their walking speed by 30%. It will also help them reduce their safety need.
If body armour has been unlocked, any (except K-9 units) Securitystaff member bought after that, will instantly spawn with the body armour equipped, without the need to visit the armoury first.