With its Multi Position Design, the GameChanger redefines aerodynamics. The special shape reduces windage by minimising exposed surfaces, regardless of weather conditions, head-tilt position and inflow angle.Features:Forced Air Cooling Technology sucks in incoming air and channels airflow around the head creating a perfect climate and keeping your head cool even in hot races Multi Position Design for optimal aerodynamics regardless of head tilt FlowStraps are aerodynamic flutter-free and skin-friendly thanks to specially developed strap profile Zoom Ace adjustment system with handy adjustment wheel for a custom fit AirPort aerodynamic glasses holder with strap guide Multi Shell In Mold for safe shock absorption Ponytail compatibilitySpecifications:Defined Color: Black Color: Velvet Black Weight: 270 keyword search: GM24855V keyword search_2: GM24855V Gender/Age: Adult Size: Medium Visor Included: No Multi Impact: No Minimum Head Circumference: 52 Rotational Protection: No Helmet Style: Road Maximum Head Circumference: 58