This bullet proof vest with collar, shoulder, front,back,sides and groin protection Our ... , what is more, it is lighter (153gsm). An NIJ IIIAbulletproof vest ( Size M ) only needs 35 layers at most. The total ... PE material, and its price is a little higher.Bulletproof vest has different protection levels; we mainly have NIJ II Level ... NIJ III and NIJ IV Level bulletproof plate. bullet proof vest