Bell likes to tout the Vortex's “awesome Velocity Flow Ventilation and FlowAdjust” features. We agree this is an awesome helmet, but as for the rest we prefer plain English: this helmet does an excellent job of keeping the wearer's head cool with multiple vents to modulate cranial ventilation. The Vortex's lightweight, polycarbonate-shell construction provides a stable shape at speed. Plus, thanks to some wind-tunnel-inspired styling, the Vortex looks fast standing still. Removing the shield for cleaning or replacement is a cinch thank's to Bell's ClickRelease system, and the helmet also comes with cut-outs around the ears to accommodate speakers for Bluetooth system of your choice. Like all our Bell helmets this one comes with a five-year warranty and removable pads for easy washing and funk elimination. Certifications: DOT, Snell M2010.