Bell Volt Race Bicycle Helmet. Designed to be used on- or off-road, the Volt bicycle Bicycle Helmet is equally at home in Tour de France as it is on the World Cup XC mountain bike circuit. Eleven frontal vents corral massive amounts of air with the help of custom-sculpted Composite Fiber Intakes, which direct flow to the Bicycle Helmet's internal StreamJet Ventilation channels. Internal Reinforcement adds structural integrity, X-Static antimicrobial padding wicks moisture, and Twin Axis Gear retention system gives you two different adjustments for the most comfortable fit ever.