The nitro x600 tetra open face motorbike helmet and shield are packed with features helmet specifications include advanced aerodynamic mpt multi poly tech polycarbonate shellscratch resistant main visorquick release visor mechanismintegral dvs double visor system for improved riding safety in all light conditionswide aperture for safer city ridingdual air filtration system at browintegrated rear exhaust ventilation ports to increase airflow within the helmetmicrometric buckle for ultim