Zamp Helmets RZ 10 Trouble Silver Ventilation - 5 Spin Vents in Key area Scalp, Chin Bar, Rear to provide excellent Venitilation Composite Fiber Shell offers added protection. zamp-racing.com/composite_fiber.htm Don't confuse fancy names for plastic Speedwing Spoiler to break air away from the shell to reduce lift and increase stability Adjustment Screw to customize spoiler Tooless Shield for easy on and off Chin Vent with Breath Deflector Meets or exceeds Snell M-2000 Standard and DOT Coolmax Removable/Washable Interior. Easily snaps in and out