Adults

An aerodynamic road bike helmet that is undeniably fast, yet surprisingly light, cool, and comfortable. Less wind. More win. When speed is your top priority and every watt counts, reach for the helmet that'll cut through the wind to save you seconds. Ballista is Trek's fastest, most aerodynamically-advanced helmet. Ballista is light, cool, comfortable, and engineered with a fully-integrated Mips Air safety system that's designed to help keep you safer. Product details: - Trek's fastest, most aerodynamic helmet will save big watts and shave crucial seconds - An excellent ventilation system makes this aero helmet surprisingly cool and comfortable - The Mips Air system is light, cool, and designed to help reduce rotational forces - The single-lace BOA® fit system is fully adjustable to provide a custom, 360° fit - Rubberized sunglasses docking port provides secure and easy-to-use storage - Beveled front edge improves field of view while riding on the hoods and in the drops - 5-STAR Virginia Tech safety rating - Complies with U.S. CPSC safety standards for bicycle helmets for persons age 1 and over

A comfortable, versatile helmet with clean aesthetics and the added protection of Mips. - Mips safety system helps provide additional protection from rotational forces in the event of certain cycling-related accidents - Refined styling with removable visor easily transitions from road to trail - Large vents and recessed channeling keep you cool on warm days - Trek Headmaster 3 fit system provides simple and secure adjustability with just one hand - Soft, comfortable helmet pads wick moisture and are easy to wash after a full day of fun