Skip to main content

Smith Optics Mainline MIPS

Smith Optics Mainline MIPS
  • Color: Matte Amethyst/Bone
  • Color: AC Iago Garay
  • Color: Matte Archive Wild Child
  • Color: Matte Black
  • Color: Matte Cinder Haze
  • Color: Matte Bone Gradient
  • Color: Matte Spruce/Safari
  • Color: White/Black
  • Color: Matte Coyote/Indigo
  • Color: Matte Slate/Fool'S Gold/Terra
  • Color: Matte Dusk/Bone
  • Color: Matte Stone/Moss
  • Color: Matte Midnight Navy/Sagebrush
Please select options Unavailable


Give credit where credit's due. Thank your mom, your legs, and your gear for giving you the opportunity to land that rocky gap. 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. It doesn't matter if you're slaying the EWS in Whistler or suffering through the last stage of your local enduro race, you need a breathable, lightweight helmet that pairs well with goggles and fits like a glove. The Mainline integrates with your bike goggles for efficient venting and fog-free vision. Multiple pad sets including liners and neck-rolls let you customize the fit.

PROTECTION: 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

FIT / INTEGRATION: 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, 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

FEATURES: 21 fixed vents for consistent airflow, Adjustable visor, Hybrid X-STATIC / Ionic+ anti-bacterial performance lining for odor resistance

WEIGHT: (Size M, MIPS) 27oz / 770g


SizeHead Circumference
X-Small 48-52cm
Small 51-55cm
Medium 55-59cm
Large 59-62cm
X-Large 61-65cm

CPSC, CE EN 1078, ASTM F1952

Part Numbers

Option UPC MPN Store SKU
Matte Amethyst/Bone / Small 716736745411 E007420WP5155 SMI35871522S
Matte Amethyst/Bone / Medium 716736745428 E007420WP5559 SMI35721252M
Matte Black / Medium 716736216867 E007429RX5559 SMI28149130M
Matte Black / Large 716736216874 E007429RX5962 SMI28831267L
Matte Bone Gradient / Small 716736745442 E007420WR5155 SMI35159431S
Matte Bone Gradient / Medium 716736745459 E007420WR5559 SMI35803843M
Matte Bone Gradient / Large 716736745466 E007420WR5962 SMI35977043L
Matte Slate/Fool'S Gold/Terra / Small 716736745473 E007420XI5155 SMI42654933S
Matte Slate/Fool'S Gold/Terra / Medium 716736745480 E007420XI5559 SMI42326861M
Matte Stone/Moss / Small 716736752761 E007420XL5155 SMI32796622S
Matte Stone/Moss / Medium 716736752778 E007420XL5559 SMI32614819M
Matte Coyote/Indigo / Medium 716736924564 E007421O65559 SMI3514053M
Matte Coyote/Indigo / Large 716736924571 E007421O65962 SMI35749258L
Matte Dusk/Bone / Medium 716736924595 E007421O85559 SMI31605267M
Matte Dusk/Bone / Large 716736924601 E007421O85962 SMI3198093L
Matte Midnight Navy/Sagebrush / Medium 716736924625 E007421PQ5559 SMI44406140M
Matte Midnight Navy/Sagebrush / Large 716736924632 E007421PQ5962 SMI44337535L