1.With leather neck protection, internal foam pad, water-sealed eaves, side hearing, ventilation holes, quick release buckle, connector. There is a lacing strap in the suspension system. It can be fully adjusted with the head strap and cheek strap. And there is a space between the mesh top strap and the shock-absorbing foam to keep the air circulation cool; 2.Features: sturdy and durable, anti-impact, anti-shock and anti-knife and cut; 3.Shell Material: PC/ABS (alloy resin); 4.Mask Material: Surface strengthened PC lens with thickness 2.5mm; 5.The helmet shell is high-pressure injection molded at one time. The lenses are treated with a special process of internal atomization and external hardening. When you are wearing it outdoors at -20°C, the lens has no fog; 6.Product Weight: 1.4kg Product Size: L Lens Transmittance>88%; 7.Packing: 1 outer box with 9 pcs, outer box size: 82*35*82cm. Wearing Device Strength Using the opening and closing function of the wearing buckle on the helmet is convenient and reliable. And it can effectively adjust the tightness of the lace. The strap can withstand a 900N tensile load. In the process of adding planting, there is on phenomenon of tearing, connecting parts falling off and wearing buckle loosening. The elongation of the strap should be less than or equal to 25mm. The buckle should be able to be used normally after unloading. The helmet top suspension system can ensure ventilation and easy adjustment. Neck Protection Structure The neck protector should be made of soft materials. It is detachable. And it is connected to the shell reliably. The length of the effective part extending outside the shell of the police riot helmet along the midsagittal plane is 120mm±20mm. Anti-leakage Performance It can withstand the spraying of test liquid. And the testing head mold will not be colored. After closing the mask, the joint part with the shell should have the function of preventing liquid from entering. Anti-impact Protection Performance It can withstand the impact of 4.9J kinetic energy on the mask. And the mask should be able to open and close normally. Impact Resistance Performance It can withstand the impact of the lg lead bullet at a speed of 150m/s ± 10m/s. And the rear cover will not be punctured or broken under the impact. Collision Energy Absorption Performance It can withstand the impact of 49J energy. And the shell does not break. Penetration Resistance It can withstand the puncture of 88.2J energy. Flame Retardant Performance The continuous burning time of the outer surface of the helmet shell should be less than or equal to 10s.