The I-vo 3D is at home on any terrain. It really comes into its own on road bikes and mountain bikes and accompanies both beginners and advanced riders safely on their bike tours. With 24 ventilation openings, the helmet enables optimum climate management - both uphill and downhill. Thanks to the 3D-IAS 3.0 size adjustment system, it can be adjusted in height and width to fit any head. At 225 grams, it is also a real lightweight and therefore does not get in the way on longer tours. The insect net reliably protects against unwanted intruders and with an optional Triangle LED, it is even equipped for urban streets at dusk. FAS strap system: infinitely variable and easily adjustable strap system for the uvex bike helmet. Monomatic: The uvex Monomatic comfort fastener can be adjusted in several stages and with just one hand.