The Leatt MTB All-Mountain 2. 0 Helmet gives us premium head and brain protection in a lightweight, super-breathable package. It features 360° Turbine Technology to absorb energy and reduce rotational accelerations in the event of an impact. 20 vents provide tons of airflow even at low speeds and the Fidlock buckle makes it easy to strap on our helmet and go when we have gloves on.