Trek Ballista MIPS Asian Fit Road Helmet M/L Used only once. There are some minor scratches from storage. Reduce drag, increase wins. If you prioritize speed above all else and want to maximize your power, choose a helmet that cuts through the wind and shaves off time. The Asian fit version of the Ballista, Trek's fastest and most aerodynamic helmet, is now available. The Ballista is light, cool, and comfortable, and features the Mips Air safety system to enhance protection from bicycle-related impacts. Product Details Trek's fastest and most aero helmet, significantly reducing drag and saving precious seconds in competition. Excellent ventilation provides amazing breathability and comfort for an aero helmet. The Mips Air Node system is light and cool, reducing rotational impact forces in the event of a bicycle accident. The single-cable BOA® fit system provides a 360° fit around the head. Complies with the U.S. CPSC safety standards for bicycle helmets for ages 5 and up. The Asian fit helmet was developed from extensive research surveying over 2,000 people in six countries.