Giro probably isn’t one of the first gear companies you associate with backcountry skiing, but the Grid Spherical is a helmet that excels out of bounds. This is an ultralight yet feature-rich model that takes some design cues from the resort-helmet world. Unlike some backcountry helmets, it has a removable liner and ear flaps and a magnetic buckle, and its adjustable vents are a rarity in this space. It also features MIPS Spherical, which places the impact reduction system inside the helmet’s shell, instead of on its interior. However, we have reservations about the Grid’s comfort, especially when you consider its hefty price.
Comfort
Warmth
Ventilation
Weight & Bulk
Durability
Sustainability
Weight
14.1 oz.
Construction
In-mold
Vents
16 (adjustable)
MIPS
Yes (MIPS Spherical)
Pros
Cons
Giro Grid Spherical
For a breakdown of this season's top lids, see our guide to the Best Ski Helmets.
When I first put the Giro Grid Spherical on, with both its liner and ear pads in (this is a key detail), it felt fine. The padding wasn’t plush, but it was well-distributed and gave the helmet a snug, comfortable feel. In that configuration, the Grid stacked up well against pretty much any resort helmet I’ve worn, including bulkier options (which are generally more cushy as a rule). The Grid’s ear pads, in particular, added just the right amount of structure and insulation without feeling overly tight.
But once I removed the liner and ear pads—which I did on a warm spring day, to get more airflow—the story changed. All of this helmet’s padding is attached to those elements, so once they’re gone, you’re left with a hard interior mostly devoid of soft areas. I quickly started feeling pressure at the top of my head, and by the end of a long lift-served day, I had a mild headache and lingering discomfort. I also noticed the helmet felt looser without that extra padding; it didn’t seem as secure, and my goggles kept slipping down the bridge of my nose. Compared to other backcountry-focused buckets such such as the Salomon Mtn Lab, which remains plenty wearable when you remove its liner and ear pads, or the Smith Summit MIPS, which has neither liner nor flaps but is a still comfortable helmet, the Grid is an inferior option—especially if you’re trying to dump heat on a warm day.
The Grid’s dial fit system on the back helped mitigate its shortcomings a little, but its placement was too high on the back of my skull to offer a locked-down feel. I prefer adjustment apparatuses that sit closer to the nape of the neck, and this one didn’t give me that secure, cradled feeling I want when skiing hard or booting up something steep. If you plan to use the Grid with the ear pads most of the time, it’s decent. Without them, though, the comfort and fit fall short.
Backcountry helmets aren’t known for their warmth, and the ultralight Grid doesn’t buck that trend. Compared to true resort helmets, such as the Smith Vantage or the Smith Level, it runs cold. I wore it on both bitter mornings and balmy spring days, and it only kept me warm when paired with a thick balaclava or a beanie. Even then, some drafts made their way in, especially around the temples.
To be fair, the Grid is warmer than the Summit, which has no liner or ear pads and sports a ton of always-open vents, and it’s about on par with the Mtn Lab. (Both of those helmets are much more backcountry-oriented than the Vantage and the Level.) Still, I expected a little more given the price and Giro’s claims of the Grid’s crossover usability. If warmth is a key concern, especially for cold resort days when you’re not moving around a ton, I’d lean toward a burlier hybrid model, such as perhaps the POC Obex BC MIPS.
While the Grid’s ventilation is one of this helmet’s highlights, it’s not as good as it could be. With 16 small vents, all of them adjustable via a single slider on the top of the helmet, it’s the only ultralight touring helmet I’ve tested with this level of temperature customization. I appreciated how easy it was to use the slider, even with gloves on, and I liked being able to modulate airflow depending on whether I was tackling a steep bootpack or descending.
That said, the vent openings are relatively small. I didn’t notice a huge difference in airflow when toggling them open or closed, and even with all vents closed, air was able to flow in when I took the liner and ear pads off. Compared to the Mtn Lab’s 12 large fixed vents or the Summit’s 33 tiny ones, the Grid’s ventilation setup is a bit less effective overall (for more on these helmets, read the Mtn Lab review and the Summit review). Still, it strikes a decent balance: not overly breezy, but not stifling, either. My goggles never fogged, and I didn’t overheat on high-output climbs. For warmer days, it’s one of the better-venting helmets I’ve worn in this category.
At just 14.1 ounces, the Grid is tied with the Mtn Lab and the Smith Method MIPS as the lightest ski helmet Better Trail has tested. That weight is especially impressive given the Grid’s slate of features that many touring helmets leave out—MIPS Spherical, a magnetic buckle, a full dial system, and adjustable vents. It’s easily light enough for all-day tours and never feels like a burden on my head or pack.
Bulk-wise, though, the fit system doesn’t fold down like the Summit’s does, which limits how flat the Grid lies when you attach it to your pack. It reminded me more of the more bulbous Mtn Lab in that regard. Still, compared to any inbounds helmet I’ve used—like the Vantage or even the Smith Nexus—the Grid felt like a feather. I never once thought about the weight while skiing or booting, and it was just as easy to throw on my pack for the approach as it was to wear it all day.
The Giro Grid uses a full in-mold construction to shave weight, and while that doesn’t feel quite as robust as the ABS shell found on some hybrid models, I still came away impressed with the build quality. After 10 days of use, the helmet showed no real wear—no dents, no fraying fabric or padding, and no degradation in the strap or adjustment system.
Everything feels solid and well-constructed, which I would hope given this helmet’s price point. The magnetic chin buckle was satisfying to use and felt like it could take abuse. I’ve dented ultralight helmets before (including the Mtn Lab), but this one held up well. For the weight class, I’d say the Grid is above average in terms of durability. Just don’t expect the bombproof feel of a resort helmet—it’s not designed for that kind of abuse.
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Longevity
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Annual Impact Report
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MIPS Spherical
Instead of sitting against the head like a traditional MIPS liner, MIPS Spherical resides between two layers of the helmet’s shell. Its ball-and-socket configuration allows the outer shell to rotate independently during an angled impact, reducing rotational forces. It’s one of the more seamless safety upgrades I’ve seen, especially since it doesn’t interfere with comfort the way standard MIPS sometimes does.
Fit System
The dial-based fit system is easy to operate and adds some security, though I wish it sat lower on my head. Without the ear pads, the Grid never felt quite snug enough, even with everything cranked down.
Certifications
The Grid lacks multi-norm certification (climbing and biking are the other two common ones), unlike the Smith Summit, which is also climbing-rated, and the Salomon Mtn Lab, which boasts all three. It’s designed for normal ski touring, not ski mountaineering, so that’s a tradeoff to be aware of.
I have a head circumference of 22.25 inches, and I usually fall between small and medium in most helmets. I tested the Grid in a size medium, and though the fit felt decent with the ear pads and liner in, it wasn’t quite as locked in as I’d like. Without the ear pads and liner, though, the helmet sat too loosely on my head—even with the dial maxed out—and caused some unwanted goggle slippage.
I’ve used a lot of Smith helmets over the years, and the fit of those tends to feel more secure right out of the box. The Grid’s shape just didn’t quite work for me without that additional interior padding. If you’re someone who frequently ditches ear pads for breathability, keep that in mind.
Smith Summit MIPS ($235): Leader of the Backcountry Pack
The Summit is our favorite pure touring helmet, and it’s easy to see why. It’s slightly heavier (1 lb. flat) than the Grid, doesn’t come with ear pads or a liner, and doesn’t have adjustable vents—but it’s triple-certified, folds flatter for packing, and offers a more secure fit for technical touring. The Grid wins on creature comforts like padding (although you’ve seen our experience if you remove the liner), vent adjustability, and the magnetic buckle, but if you already have a resort helmet and want something dedicated to the backcountry, the Summit is the better buy. For a deeper dive, read our review of the Smith Summit.
Salomon Mtn Lab ($290): The Original, Still Going Strong
The Mtn Lab feels closer to the Grid in both features and design. It weighs the same, includes ear flaps and a merino liner, although it’s also triple-certified for climbing, skiing, and biking, which the Grid is not. It’s more breathable thanks to its large fixed vents and offers better comfort once you remove the liner, but it lacks MIPS entirely. If you prioritize comfort and climbing certifications over rotational protection, the Mtn Lab is a strong alternative. For more, read our Mtn Lab review.
The Grid Spherical is an ultralight yet feature-rich model for backcountry skiers. Unlike some touring-specific helmets, it has a removable liner and ear flaps, a magnetic buckle, and adjustable vents, and features MIPS Spherical. However, we have reservations about the Grid’s comfort.
Comfort
Warmth
Ventilation
Weight & Bulk
Durability
Sustainability
Certified for skiing and mountaineering and with an exceptionally light, packable build, this helmet is a backcountry specialist. It’s our current favorite for big days touring and ski mountaineering, but its minimalist build is out of place at the resort.
Comfort
Warmth
Ventilation
Weight & Bulk
Durability
Sustainability
One of the first backcountry-focused ski helmets, the Mtn Lab is still a stalwart of the category. It prioritizes ventilation and low weight over plushness and warmth, yet still offers a level of comfort and versatility not often seen among touring lids. With triple certification, it can also be worn for biking and climbing.
Comfort
Warmth
Ventilation
Weight & Bulk
Durability
Sustainability
If you’re looking for a lightweight ski helmet that blends backcountry functionality with resort-friendly features, the Giro Grid Spherical has a lot going for it. Its MIPS Spherical tech, removable padding, and adjustable vents set it apart from more stripped-down touring models. But comfort and fit suffer once that padding is removed, and the lack of truly heat-beating ventilation and climbing certification limits its ski mountaineering potential. For weight-conscious ski tourers who value versatility and tech, the Grid may still be worth the high price—just make sure the fit and feel work for you before you commit.
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