Shell:Intensification Polycarbonate&ABS base on first classic Polycarbonate,can afford beat of 24 pounds hammer,shell will not break;High quality in impact proof,scratch proof,acid proof etc. Visor: Polycarbonate, hardening surface,convex/flat visor,2mm in thickness, resistant to impact、scratch、abrade,9 3% transmittance，permanent fog-proof Lining system: Empty net,use absorbent sweet net fabric, with EVA cushioning deck,supply for comfortalbe use ,good cushioning action,and breathe freely ,good absorbent sweet action. Shield frame: Stainless steel material,supply for three grade when visor need to close or open,and visor will not down when it in the grade.Soft rubber between shell and frame,supply for good sealing performance. Chin strap: Rubber strap,fire resistant belt and quick released button.Use three points belt vinculum to ensure to wear firmly. Neck protector: Leather with highdensity sponge insert. Other matrials in producing: use pro-environment material to fit all parts. Colors: Dark black,Black,Bule,White,Olive Green Size: S:54-56 M:56-58 L:58-60 G/N weight: 19.72/15.39 KGS/CTN Packing size: 92×38×76 CM/9PC/CTN The helmet is standard, we also can change material of shell ,and thickness of visor:3mm.4.2mm,6.5mm