I have a Bambino. I tried it for some Mass Start events when I first got it, but it didn't work for me. It was just too hot. There is little to no ventilation in it, and in the heat and humidity, it was killing me. I even stopped wearing it in sprints for that reason. I've gone to a Kask Utopia to wear during any mass start events and hot sprints. I will use the Giro Aerohead for F200s and Kilos.