One thing that makes our vest better than others is the amount of velcro area. Look at those wide size straps. This vest will fit more people and stay more secure than any other. Note also, that the velcro is reinforced with the nylon flaps. Poorly made vests just have the velcro itself. That isn't strong enough for us. Your vest can only protect you if it stays on.
Click to enlarge this photo of the BulletSafe bulletproof vest.