The 2011 Giro Advantage 2 Time Trial Cycling Helmet is the time trial helmet of choice for great champions like Lance Armstrong, Alberto Contador, Levi Leipheimer, Dave Zabriskie, and David Millar. Wind tunnel testing proves why it is so popular--Advantage 2 represents the pinnacle of aerodynamic performance, fit, and ventilation. Advantage 2 is the ultimate helmet to wear when every thousandth of a second counts, from prestigious prologues at le Tour to ultra distance triathlons.