Stab vest
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For the type of buoyancy compensator used in scuba diving, see stab jacket.
A stab vest is a reinforced article of clothing, worn under or over other items of clothing, which is designed to resist knife attacks to the chest, back and sides. Stab vests are different from bulletproof vests, most of which offer protection against firearms but afford little against stabbing with sharp-tipped objects such as knives; most stab vests afford less protection against bullets, particularly those of high calibre, but are designed to prevent serious injury by prohibiting knife penetration beyond a few millimeters.