The Advantage 2 was honed to a razor's steely perfection in the heat of elite competition. If you need a helmet that slices the wind and slashes your time, this is the cutting edge of aerodynamic performance. In-mold construction with 5 vents, internal channeling and Roc Loc 4 retention system. Wind tunnel and competition proven design. Weight: 11oz/310g. Team Cyclist is an authorized Giro dealer and will honor all manufacturer warranties. Team Cyclist is an authorized Giro dealer and will honor all manufacturer warranties.