Mizuno Samurai Catchers Helmet G4 - Boys' Grade School Mizuno's Samurai G4 catcher's gear is made using innovative construction for durability, comfort, and lightweight performance. This helmet's new design features a strategic ventilation system for added breathability. Inside are three layers EVA foam padding and soft, adjustable jaw pads with moisture-control technology. The strong steel mask gives the maximum level of protection and durability. Meets NOCSAE standards. Sz: Fits 6 1/2"-7 1/4" or head circumference of 20 1/2"-22 3/4".