850566: • Aerodynamics redefined
• Multi position design for optimal aerodynamics regardless of the angle of the head
• Forced Air cooling technology for a clever ventilation system and optimal head temperature
• Aerodynamics Flowstraps, flutter-free and skin friendly
• Eyewear port: Aerodynamics bracket at the back for glasses with temple channels
• ZOOM Ace fine 3D-adjustement system with handy dial for personalized fit. 
• Ponytail compatible