Bell Event XC Bicycle Helmet Closeout. Whether you're toeing the start line at a local XC race, or hitting the trail for the first time, the last thing you want to worry about is your Bicycle Helmet. The Bell Event XC Bicycle Helmet has you covered with its user friendly fit features, comfortable cooling technologies, and off road style. The TAG fit system makes it easy to dial in the perfect fit while the Overbrow Ventilation helps channel in cool air and draw out heat perfect on those long, grinder climbs. Additionally, the Variable Position Visor shields you from sun glare, so your vision stays sharp when you're ripping through the mountains.