During initial battle engagements, a considerable number of infantry causalities resulted from head wounds which are caused by shrapnel and fragmentation from artillery shells.  Today, fragments are still the most common wound threat in modern warfare.  Therefore modern military helmets are designed mainly for protection against fragments and not high-velocity rifle bullets.  The manufacturing of practical helmets with high resistance to both fragments and bullets remains infeasible due to the considerable weight it adds to an infantryman.

In history during the warfare, metal has been the preferred material for armor.  In fact, the U.S. Army used a standard steel helmet up until the early 1980s.  But now so many developments have been made in the helmet technology due to changing requirements of the military. Now they have been designed with the protection, performance, and comfort.

The modernization in latest trends of military helmets for the future soldier necessities like lighter weight, comfort, and compatibility with advanced communication equipment have been widely adopted by many of the countries. In this development PASGT (Personal Armor System Ground Troops) style has been mostly preferred by the troops and military as it meets to the requirement for a more protective helmet.

As regards with the protection level of these helmets it is mostly based upon fragmentation protection required and it is measured by V₅₀  in terms of fragment simulating projectiles of varying weight. Today most new helmets have a protection level of V₅₀ in the range of 550-680m/s. This level of protection is likely to continue to be the standard for the foreseeable future, though with more attention paid to the small, high-speed fragments and low-velocity bullets.

In terms of weight comparisons, aramid fibers like Kevlar are five times stronger and lighter than steel, leading most armed forces to protect their personnel against fragments and shrapnel with composite helmets that includes it. Military helmets designed with aramid fabric are more resistant to fragments than their steel predecessors. Furthermore advanced specifications for helmets with temperature and flame resistant can only are met by para-aramid fibers. The non-melting and self-extinguishing properties of these fibers keep heat and flame outside the helmet and away from wearer’s head.

The fundamental characteristics of MILITARY PASGT HELMET are lightweight and high ballistic performance and these are vital to militaries everywhere. The military helmet offers a definitive approach in these important areas of performance.