Bell Volt XC Bicycle Helmet. For hard charging riders in search of an incredibly well designed cross country Bicycle Helmet, look no further than the Bell Volt XC. It delivers massive ventilation and a super comfortable fit that makes you forget it's even there when you're out there red lining it on the trails. Cool air passes through the StreamJet channels and out the rear exhaust ports to regulate temperature and sweat. The Twin Axis Gear TAG fit system lets you dial in comfort quickly and easily while the Variable Position Visor VPV offers precise positioning to fight sun glare or shield eyes from rain and mud. The visor is removable, too, making the Bicycle Helmet equally at home on the road as it is on the trails.