Met parabellum helmetthe met parabellum helmet is the benchmark for all mountain helmets a masterful blend of tech design and protection riders can tackle any adventure nature throws their way secure in the knowledge theyre wearing a helmet custom made to take all mountain to the next level the parabellum helmet is lightweight and designed to offer coverage extending down the back of the skull an aluminium ratchet system allows riders to adjust their built in visor and those that love to s