A champion on the trails and streets. The Uvex i-vo 3D offers much more than just sporty style - it's lightweight and ideal for beginners and experienced cyclists alike. the helmet's 24 vents ensure perfect temperature regulation - whether you're panting uphill or riding downhill. The helmet includes an insect net that reliably protects you from unwanted intruders. IAS 3 3D size adjustment system.0 allows you to adjust the height and width of the helmet to the exact shape of your head. If you need additional protection in the evening, choose the optional plug-in LED.