This battle-ready helmet has been expertly modified to provide the ultimate protection in combat situations. Its wide diameter rivet ensures a snug fit and its special locking system allows for rapid removal should the need arise. Without sacrificing visibility or breathability, combatants can trust this piece of armor to keep them safe during combat. • Made of 2.5mm steel; thickness may vary due to the handcrafted methods • Steel is untreated but can be protected with mineral or synthetic oil if desired. • Leather chin strap included • Standard size = 57~61 cm Perimeter