When you are too focused on the finish line to notice how bad your legs are burning, you need Louis Garneau's P-09 Aero Helmet. Its reduced frontal surface is more compact and the boat tail reduces drag, making for a superior aerodynamic helmet. Four vents, including one that can be closed in the front, increase airflow, while Icefil padding keeps you cool. The P-09 lens (included) can be flipped up with one hand for easy transitions. You can also adjust the fit with one hand by tightening the anti-slip wheel on the Spiderlock Pro II retention system. Retractable ear flaps open and close smoothly and effortlessly for an easy transition without compromising aerodynamics. Slip on the P-09, take a deep breath, and prepare to set personal records!