... .For Police, Security ForcesSpecification:1.Shell: Intensification Polycarbonate&ABS in base of first classic Polycarbonate,can be afford able beat ... 9 3% transmittance3.Lining system: Aerial net lining system, three point style ,use absorbent sweet net fabric , with EVA cushioning deck,supply ... to close or open,and visor will not down when it in the grade.5.Chin strap: Rubber strap,fire resistant belt ...