The Register™ helmet combines sleek design and lightweight construction with understated features that will complement your style, whether on the road or trail. The In-Mold construction, with full hardbody polycarbonate shell and EPS liner offers a compact shape, a whopping 22 individual air vents work to channel cooling airflow onto the wearer, while quick-dry padding works to wick sweat and moisture away. With Giro’s patented Universal fit sizing, and their convenient Roc Loc® Sport fit system, the Register adjusts with a simple one-handed turn of the dial, so you can customize the fit in seconds.