Protection for your most vital organ - your brain. A bullet or high velocity fragment impact to your head will generally result in immediate fatality.
Bullet Proof Helmets are used by military, police and news personnel the World over. Surprisingly, very few life saves have ever been recorded from a gun shot. It is less surprising if you consider that fatalities from firearms in war zones are actually quite rare. Practically all fatalities in conflict zones are the result of primary and secondary fragments from an explosion. A primary fragment would be a fragment emanating directly from a blast. The secondary fragment is a consequence of the first - this might be concrete fragments from a building hit by a tank shell, shattering glass or a ceiling / building collapse.
Our bullet proof helmets will protect from blast fragments and direct strike from most standard hand gun and submachine gun ammunition. They will also protect from the obvious trauma effect of hand thrown missiles.