Notes: 4X Vests are sold on a separate page. Click here. XS Vests are too small to contain an accessory pocket on the front and back, so they lack this feature. You can download a full spec. sheet about the BulletSafe Vest here. Another note on bulletproof vest sizing: Your bulletproof vest needs to fit in one main area: around your stomach. The length of the vest is not important as you can use the shoulder straps to adjust it; the important factor to consider is the diameter of your midsection. If you have a large belly try to order at the top of your size range so that you can fasten the vest around your mid-section. If you are a competitive cyclist or bodybuilder with a slim waist, order at the bottom of your size range. What bullets can this vest protect against? A Class IIIA vest can protect against almost all handgun rounds. IIIA vests (ours included) are tested with bullets up to a .44 Magnum, which is a really powerful round. This vest will protect against smaller rounds as well. We are quite comfortable in saying that a class IIIA vest will protect you from almost any handgun you will encounter and certainly any handgun that someone conceals. Handgun violence makes up most of the shooting injuries in the US, so this bulletproof vest offers a great level of protection for you.