Skip to main content

Smith Mainline MIPS Full Face Helmet


Find Your Line

If you’re into the gravity-fed side of mountain biking, you know that when you hit the trail, sometimes the trail hits back. But thankfully, you don’t have to sacrifice comfort to get the protection you need when you’re wearing the Smith Mainline MIPS Full Face Helmet. Despite its lightweight construction and generous ventilation, the Mainline has earned an ASTM downhill certification, which ensures the highest degree of protection. The reinforced chin bar gets plenty of vents to keep you from feeling restricted while you breathe, while the AirEvac™ ventilation system pulls hot air out of your goggles to fight the fog. And the proven combination of MIPS, which protects against rotational impacts, and Koroyd®, which efficiently absorbs energy while aiding in cooling, contribute to this being not only one of the lightest full face helmets available, but one of the most trustworthy as well.


  • Incredibly lightweight and well ventilated full face helmet 
  • Unique design is ideal for enduro racing and bike park days
  • Koroyd® technology provides serious protection and enhanced cooling
  • DH certification ensures the highest degree of protection 
  • MIPS low-friction layer in between the shell and liner reduces the force of angled impacts
  • Adjustable visor stops the sun from ruining your ride
  • Front and rear channels store your eyewear safely when not in use
  • 21 vents work to cool you off when the temperature heats up
  • AirEvac venting system stops your goggles from fogging up


  • Gender: Unisex
  • Best Use: Mountain Biking, Downhill, Enduro, Bike Park
  • Weight: 27 oz (Size Medium)
  • Safety Certifications: CE EN 1078, ASTM F1952 Downhill
  • Size: [Small] - 51-55 cm, [Medium] - 55-59 cm, [Large] - 59-62 cm
  • How to Measure: Measure around the head about 1 inch above the eyebrows