BulletProofME.com Body Armor - Vest Selection Chart
Most convenient for short duration, on and off use. Level III-A Concealable Vests. Tested for unusual threats: 9mm sub-machine-gun and .44 Magnum. Not likely to see those threats on the street, but more blunt trauma protection than Level II for the likely threats. The tradeoff is that 3A is a little thicker, heavier and harder to conceal.