Smith
Mainline Mips Full-Face Helmet

$350.00

Quantity

Join Summit Club+ and

The Mainline MIPS Full-Face Helmet is as light as a half-shell and tougher than the trail

What Our Gearhead® Experts Are Saying:

"I wore the Mainline MIPS on hot enduro days where I would normally reach for a half-shell just to stay cool, and the AirEvac system with 21 vents genuinely changes that calculation — it breathes better than any full-face I've used at this weight. The Koroyd and MIPS combination gives me real confidence on consequential terrain, and the multiple pad sizes made it easy to dial in a secure fit right out of the box. Note that this one runs small, so sizing up is the move."

Hot weather used to mean choosing between comfort and full-face coverage, but the Smith Mainline MIPS Full-Face Helmet takes that tradeoff off the table. Built for enduro riders and downhill racers who spend as much time sweating on the climb as sending on the descent, this helmet delivers certified downhill protection with the kind of airflow that makes it wearable all day long.

Smith engineered the Mainline MIPS around an Aerocore in-mold polycarbonate shell reinforced with Koroyd crumple zones that absorb and disperse impact energy on contact, paired with a MIPS layer that addresses the oblique and rotational forces common in real-world trail crashes. The AirEvac ventilation system drives airflow through 21 ports across the helmet, keeping head temperature regulated from the shuttle to the finish line. An adjustable visor handles sun and roost, and the fit system includes three cheek pad sizes, two crown liner sizes, and two neck roll sizes so the helmet can be tuned to the individual rather than settled for. Anti-odor pads are removable and washable for long seasons of use, and the D-ring fastener keeps the chin strap secure and lightweight. The Mainline MIPS runs small — sizing up is recommended for the best fit.

Details

Full-face helmet built for enduro and downhill with ASTM F1952-15 certification
Aerocore polycarbonate shell with Koroyd absorbs and disperses impact forces
MIPS layer reduces rotational and oblique impact transmission
AirEvac system with 21 vents delivers half-shell-level airflow
Adjustable visor manages sun exposure and trail debris
Multiple pad sizes allow a personalized and secure fit
Removable washable anti-odor pads hold up across a full season
Runs small, sizing up is recommended for best fit
Item #SMIZ99F

Shell Material: Aerocore in-mold polycarbonate
Audio Compatible: no
Ventilation: AirEvac system (21 vents)
Fit Adjustment: 3 different sizes of cheek pads, 2 different sizes of crown liners, 2 different sizes of neck rolls
Visor: adjustable
Certifications: ASTM F1952-15, Complies with U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and Older
Claimed Weight: [large] 1lb 15.6oz
Activity: downhill, enduro
Manufacturer Warranty: [sunglasses, goggles] limited lifetime, [helmets] limited 3 years, [apparel, accessories] limited 1 year

A smiling man wearing a black Smith helmet and gold-tinted goggles with a white strap stands against a snowy background.

60 Years Of Innovation

Since day 1, innovation has been the heartbeat of Smith. From game-changing goggles to groundbreaking eyewear, Smith never stops pushing what’s possible.

Shop All Smith