The Giro Advantage 2 Helmet shaves precious time when every millisecond counts. Its efficient teardrop shape cuts drag in the aero position, allowing you to gain a leg up on the competition during time trial and triathlon events, as evidenced by its use with top cycling pros. The Advantage 2's In Mold construction fuses a tough polycarbonate outer shell to a crash absorbing foam liner. The result is better sculpted ventilation, enhanced crash protection, and lightweight performance. Its Wind Tunnel ventilation actively moves heat off your head, courtesy of five deep vents at the frontside, which channel air through the rear exhaust ports. Moreover, you'll appreciate the Roc Loc 5 fit system for its snug, ultra precise fit with the simple twist of its micro adjustable dial. This fit system also leverages a three position bracket with 15mm of vertical adjustment, ensuring a near custom fit without excess slop or uncomfortable pressure points.