The pinnacle helmet in Smith's mountain bike collection is the all new, DH certified, Mainline. Featuring complete Koroyd® coverage and the MIPS® rotational system, the Mainline provides exceptional protection while combining internal air channels and open exhaust ports to maximize breathability. As goggle fit and ventilation are crucial for grueling days, the AirEvac™ system relieves hot air that builds up on your goggles, to prevent fogging. Included with the Mainline are three sets of uniquely sized cheekpads, two sets of uniquely sized crown liners, and two unique neck rolls to ensure a proper fit; all components can easily be removed for cleaning. Ride with confidence knowing the Mainline is secured with a tried and true D-ring chin strap fastener.

Complete KOROYD® coverage for lightweight, energy-absorbing and ventilated impact
Mips® Brain Protection System reduces rotational forces caused by angled impacts to the head
Complies with U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and
Older as well as CE EN 1078, NTA8776 E-Bike and ASTM F1952 Downhill
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® / Ionic+® anti-bacterial performance lining for odor resistance
Weight (Size M, Mips®): 27 oz / 770 g