Loomis, the armored car company that employed the two men, does not require its guards to wear body armor on the job.
“While we encourage them, the choice to wear a vest is up to the individual,” Loomis spokesman Mark Clark told the Philadelphia Inquirer.
Loomis employees must buy their own vests at a charge of about $500, but the company offers interest-free financing for the purchase.
At presstime Philadelphia police and other local law enforcement were conducting a massive manhunt for the suspect.
He is described as a black man, wearing a yellow baseball cap with a black logo, a black short-sleeved shirt, blue jeans, and white sneakers. Video of the robbery indicates that he was driving a four-door black Acura TL with a sunroof. Police said Friday that they may have located the car.