Mainline Mips Full-Face Helmet
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Why We Like The Mainline Mips Full-Face Helmet
Smith makes their debut into the world of ultra-light full-face helmets with the all-new Mainline MIPS. Featuring extensive ventilation and lightweight yet tough construction, this helmet offers the airy feel of a half-shell while providing downhill-certified coverage for a boost of confidence on rowdy trails. Advanced protective features include Smith's unique Koroyd crumple zones that go above and beyond to disperse impact forces, as well as a MIPS protective layer that helps mitigate harmful oblique impacts.
Details
- Smith's lightweight full-face for enduro and downhill
- ASTM certified for downhill mountain bike racing
- 21 vents keep you cool during summer shred sessions
- Koroyd layer provides superior impact absorption
- MIPS protects against oblique and rotational impacts
- Comes with multiple pad sizes to ensure a proper fit
- D-ring fastener is lightweight and super secure
- Anti-odor pads are removable and washable
- Item runs small, so we recommend sizing up 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
Reviews
Q&A
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Overall Rating
4.5 based on 309 ratings
Review Summary
Fits Slightly Small
Screen reader users: the following list provides a visual scale to illustrate the product fit. Please refer to the heading above for the fit type in text.Customer Images
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Selecting an option will reload the available reviews on the pageMarch 6, 2025
Nice fit, comfortable, good air flow
- Familiarity:
- I've used it several times
Nice fit, comfortable, good air flow, no distractions. Fun color pop. Size medium.
Originally reviewed on Backcountry.com
February 17, 2025
Med. Helmet; hat size 7-1/4
- Familiarity:
- I've used it several times
I wear 7-1/4 fitted hat, 7-1/8 when I had shorter hair. The size M fits comfortably snug with the medium size pads that come installed. (I didn't bother trying the small or large pads because it's spot on.)
Originally reviewed on Backcountry.com
August 18, 2024
10/10
Crashed at a bike park and I'm convinced this helmet is the only reason my skull isn't cracked open. So thankful I was wearing this helmet. I've heard people say it's squeaky and it is if I purposely listen for it but I don't notice it at all while I'm riding.
Originally reviewed on smithoptics.com
July 16, 2024
They work!
I took the worst crash of my career last week and the mainline worked flawlessly.
Originally reviewed on smithoptics.com
May 26, 2024
Highly recommend
I have been wearing one of these helmets for about a year. It is comfortable, well vented and light. After crashing at a bike park and landing face first on a rock I can also confidently say that it offers great protection also. I broke the helmet,but walked away with only a small cut on my face. I also bought the same helmet as a replacement. If you're considering buying a mainline, get one.
Originally reviewed on smithoptics.com
May 17, 2024
Solid
Great product. Don’t normally bother writing reviews but just went over the bars and landed on what would have been my face if it hadn’t been for this helmet. Body pretty banged up but not a scratch on my face/head
Originally reviewed on smithoptics.com
February 13, 2024
Meh
I might get some backlash here, but I may be the only one that hates this helmet. Pros: -Lightweight -Breathable -assorted cheek pad sizes Cons: -No rear tension for a snugger fit -Chin strap is impossible with gloves on *prefer a quicker release like the Bell Quick Air chin strap -sizing is off, the med didnt feel secure on my dome and a small was too snug -i cant pull up my goggles for a quick breather, they flop right back into your face I wore this helmet once on a longer ride and was so ticked the whole time. I fumbled with my gloves every time i wanted to take it on and off for a breather. And i know its not just me because my friend has this helmet and its annoying with the chin strap and gloves. I didnt like how lose it felt, i had to have the chin strap basically choking me and even then i just didnt like the fit. If Smith adds a rear tension adjustor and an easier way chin strap i would love it. Just not for me. Lame.
Originally reviewed on Backcountry.com
February 6, 2024
I've owned Smith ski helmets, first Smith bike helmet.
Great fitting, great looking, confidence booster. I haven't taken a fall with the Mainline, but feel that it will keep me safe if that day comes.
Originally reviewed on smithoptics.com
October 13, 2023
Le casque est parfait! Il
Le casque est parfait! Il est super confortable et le design est simple comme j’aime!
Originally reviewed on smithoptics.com
August 23, 2023
Did it’s job well
Saved my wife’s face on a fall. This helmet did its job well and bought another one.
Originally reviewed on smithoptics.com
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