Alpina Tour 2.0 - The Tour 2.0 cycling helmet with the proven Run System. The bicycle helmet can be optimally adjusted to any head size with one hand using the comfort knob. The Alpina Tour 2.0 cycling helmet is equipped with a front shield and airflow vents; aerodynamic ventilation openings guarantee a heat-free cycling tour. To protect the head from insects, the front openings of the helmet are lined with a special mesh fabric.