The giro aeon road bike helmet is full of giros best features with every component optimized to bring you a better lighter and cooler helmet the massive vents with interior channelling thrust cool fresh air over and around you head while forcing hot stale air out to give you unbeatable ventilation the in mold construction allows the helmet to be lighter more durable and ventilated than traditional designs the liner becomes literally part of the helmet reinforcing areas around vents and ri