Bicycle helmets have long been underestimated in Road cycling. But at speeds of up to 100 km/h you should definitely wear a helmet. There is no reason to ride without a bike helmet. Ventilation has improved steadily over the years and is at an excellent level. In addition, the fit has been developed further and further and should no longer restrict any Road cyclist. In addition, the helmets are very light. So the wearing comfort on long rides is also very high, because the head does not get too heavy. Of course they should also be aerodynamic, especially in Road cycling. That's why, unlike Mountain bike helmets they have no visor and are generally rounder and more streamlined.