off-road helmet, full face helmet 1.ABS shell 2.Removable and washable interior comfort liner3.Adjustable flow through ventilation system for cooling and comfort 4.Air channel technology chin forehead and exhaust ventilation5.Adjustable chin vent to aid in cooling and shield defogging 6.Anti-scratch and anti-fog PC visor7.Particularly design of air pump system in the interior liner(features are ...
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