Made for going big, going fast, or both, the Smith Mainline is our pinnacle, downhill certified enduro bike helmet. Safety innovations like Koroyd™ and MIPS® provide energy-absorbing impact protection so you have the confidence to get aggressive on the trail.

FEATURES:

• Aerocore™ construction featuring complete Koroyd® coverage for lightweight, energy-absorbing and ventilated impact protection
  
• MIPS® Brain Protection System reduces rotational forces caused by angled impacts to the head
  
• CPSC CE EN 1078 and ASTM F1952 downhill certified
  
• Designed for ultimate integration with Smith performance goggles for maximum comfort, venting and storage convenience
  
• AirEvac™ ventilation system integrates with Smith goggles for fog-free lenses
  
• Three washable cheek pad kits, two crown liners and two neck rolls let you fine tune the fit
  
• D-ring chin strap fastener for a snug fit
  
• 21 fixed vents for consistent airflow
  
• Adjustable visor
  
• Hybrid X-STATIC® / XT2® anti-bacterial performance lining for odor resistance
  
• Weight (Size M, MIPS®): 27 oz / 770 g
  

• Complies with U.S. CPSC Safety Standard for bicycle helmets for persons aged 5 and older.