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A modular helmet is never going to weigh what a full-face does. The flip-up chin bar needs a pivot mechanism, a locking latch, and usually a second visor system, and none of that is optional weight - it's the entire point of the design. So when touring riders ask for "the lightest modular helmet," what they actually mean is: which flip-up helmets fight that weight penalty the hardest, and by how much. This guide only includes helmets with a manufacturer-stated weight in grams or pounds, pulled from the product listing or the brand's own spec sheet, because a modular helmet roundup that guesses at weight is not useful for the one thing that matters here.
The short version: carbon-shell modulars close most of the gap. LS2's Advant X Carbon and Simpson's Mod Bandit Carbon both land under 1,650 grams, which is respectable for a helmet with a moving chin bar and a drop-down sun visor. Composite-shell modulars (fiberglass or polycarbonate blends) run 150-400 grams heavier for a comparable size and certification. None of the helmets below get close to AGV's Sportmodular, the carbon flip-up that AGV lists at 1,295 grams and that remains the lightest production modular on the market - but that helmet currently has no active buyable listing on Amazon, so it is referenced in the buying guide below rather than ranked as a pick.
Key Takeaways
- Carbon shells close most of the weight gap - LS2's Advant X Carbon (1,470g) and Simpson's Mod Bandit Carbon (about 1,615g) are the two lightest certified modulars in this roundup, both under 1,650g.
- The hinge and second visor are unavoidable weight - even the lightest modular here is still 100-400g heavier than a comparable full-face helmet, because the flip mechanism and drop-down sun visor have no full-face equivalent.
- P/J homologation, not DOT alone, tells you if riding open is rated - DOT (FMVSS 218) does not test the open-face configuration the way ECE 22.05/22.06 P/J does. Check the certification column below before assuming a helmet is legal to ride with the chin bar up.
- Bluetooth-integrated modulars carry extra mass that isn't in the shell - the Sena Impulse bundles speakers, a mesh intercom radio, and a battery, yet still lands lighter than a couple of the passive composite-shell competitors on this list.
- Manufacturer weights are per shell size, not universal - most brands mold two or three shell sizes across their size run (XS-S share one shell, M-L another, and so on), so the number quoted is for the size the brand tested, and your exact size may vary by the stated tolerance.
| LS2 Advant X Carbon Modular Helmet |  |
Best Overall - Lightest Certified Modular | Weight: 1,470g ± 50g (per LS2's listing) | Shell Material: 9K woven carbon fiber, full carbon chin bar | Best For: Riders who want the lightest DOT/ECE-certified modular currently sold on Amazon | VIEW LATEST PRICE | Read Our Analysis |
| LS2 Advant X Modular Helmet (Composite Shell) |  |
Best Proof That Carbon Saves Weight | Weight: 1,600g ± 50g (per LS2's listing) | Shell Material: Kinetic Polymer Alloy (KPA), two-shell molding | Best For: Riders who want the Advant X platform without paying the carbon-shell premium | VIEW LATEST PRICE | Read Our Analysis |
| Simpson Mod Bandit Carbon Fiber Modular Helmet |  |
Best Streetfighter-Style Carbon Modular | Weight: About 1,615g / 3.56 lb (per Simpson's published spec) | Shell Material: Woven carbon fiber | Best For: Riders who want Simpson's racing-derived styling in a genuinely light carbon shell | VIEW LATEST PRICE | Read Our Analysis |
| Sena Impulse Smart Modular Helmet |  |
Best Smart/Bluetooth Modular | Weight: 1,760g ± 50g, DOT version (per Sena's published spec) | Shell Material: Composite/polycarbonate shell with integrated electronics bay | Best For: Riders who want built-in group communication without adding a bolt-on comm unit's weight | VIEW LATEST PRICE | Read Our Analysis |
| Bell SRT-Modular Helmet |  |
Best Eyewear-Friendly Fiberglass Modular | Weight: About 3.89 lb / 1,764g (Bell's advertised weight) | Shell Material: Fiberglass composite | Best For: Glasses-wearing riders who want a mid-weight, mainstream-brand modular | VIEW LATEST PRICE | Read Our Analysis |
| ScorpionEXO GT930 Transformer Modular Helmet |  |
Best Value Dual-Homologated Modular | Weight: About 4 lb 1 oz / 1,843g, size Large (per retailer spec sheets) | Shell Material: Advanced Polycarbonate | Best For: Riders who want P/J certification and EXO-COM compatibility at the lowest price in this roundup | VIEW LATEST PRICE | Read Our Analysis |
| Shoei Neotec II Modular Helmet |  |
Best Premium Touring Modular (Heaviest Pick) | Weight: 1,855g / 4.09 lb, size Medium (per retailer spec sheets) | Shell Material: Shoei AIM (Advanced Integrated Matrix) fiberglass composite | Best For: Riders prioritizing refinement and quiet over the lowest possible weight | VIEW LATEST PRICE | Read Our Analysis |
More Details on Our Top Picks
LS2 Advant X Carbon Modular Helmet
LS2's own listing states the Advant X Carbon weighs 1,470 grams plus or minus 50 grams, which makes it the lightest modular helmet in this roundup with a manufacturer-published number. That figure comes from a 9K woven carbon fiber shell that extends into the chin bar itself, not just the crown - the chin bar is usually the heaviest single component on a modular helmet, so building it in carbon rather than reinforced plastic is where most of the weight saving actually happens.
The listing also states dual ECE 22.06 P/J homologation on top of DOT FMVSS 218, meaning the shell has been tested and rated for both the chin-bar-down (full-face) and chin-bar-up (open-face) configurations. That combination - genuinely light and dual-rated for open riding - is a fairly short list among modular helmets currently sold in the US.
The single-axis 180-degree pivot lets the chin bar rest flat behind the head rather than sticking up at an angle, which keeps the helmet's profile compact when riding open. LS2 pairs the shell with a Pinlock-ready A-Class shield and includes the anti-fog insert rather than selling it separately, which several competitors on this list do not do.
LS2's own sizing note on the listing warns that this helmet runs small and recommends ordering at least one size up from a standard fit chart. That's worth following literally - a modular helmet that fits too small will not seal properly at the base, which undercuts both the noise control and the weight advantage this helmet is built around.
- Weight:1,470g ± 50g (per LS2's listing)
- Shell Material:9K woven carbon fiber, full carbon chin bar
- Certification:DOT (FMVSS 218) and ECE 22.06, P/J dual-homologated
- Modular System:180-degree single-axis pivot, chin bar rests behind the head when open
- Visor:Pinlock-ready A-Class polycarbonate shield with built-in sun visor, Pinlock Max insert included
- Sizes:XS-3XL
- Best For:Riders who want the lightest DOT/ECE-certified modular currently sold on Amazon
LS2 Advant X Modular Helmet (Composite Shell)
This is the same Advant X platform as the Carbon pick above, molded in LS2's Kinetic Polymer Alloy composite instead of woven carbon. LS2's listing states 1,600 grams plus or minus 50 grams for this version, which puts the weight difference between the two shells at roughly 130 grams for an otherwise identical helmet - a useful, apples-to-apples illustration of what a carbon shell is actually buying you on a modular.
Everything else on the spec sheet matches the Carbon version: the same 180-degree modular mechanism, the same DOT and ECE 22.06 P/J dual certification, and the same Pinlock-ready shield with the insert included rather than sold separately. The KPA shell is a two-layer composite molding, which is LS2's mid-tier shell material - lighter than a basic ABS/polycarbonate blend but not as light as the woven carbon used one tier up.
For a rider deciding whether the carbon upcharge is worth it, this helmet is the direct comparison point: 130 grams is noticeable on a long day in the saddle, but it is not the difference between a comfortable helmet and an uncomfortable one. Riders who mostly care about the flip-up convenience and P/J rating, and less about shaving the last few hundred grams, get the same core helmet here for less.
Like the Carbon version, LS2 notes this helmet runs small and recommends sizing up from a standard fit chart. The two shells share a liner and cheek pad system, so a rider who has tried one on can trust that sizing note applies to the other.
- Weight:1,600g ± 50g (per LS2's listing)
- Shell Material:Kinetic Polymer Alloy (KPA), two-shell molding
- Certification:DOT (FMVSS 218) and ECE 22.06, P/J dual-homologated
- Modular System:180-degree rotating chin guard, same platform as the Carbon version
- Visor:Pinlock-ready A-Class polycarbonate shield with built-in sun visor, Pinlock insert included
- Sizes:XS-3XL
- Best For:Riders who want the Advant X platform without paying the carbon-shell premium
Simpson Mod Bandit Carbon Fiber Modular Helmet
Simpson's listing calls the carbon fiber woven shell "one of the lightest modular helmets in its class," and independent retailer spec sheets put the actual number at about 3.56 pounds, or roughly 1,615 grams - close enough to LS2's carbon pick that the two are separated by less than 150 grams. The carbon weave is visible under the finish rather than hidden under paint, which is consistent with how Simpson markets its racing lineage.
The Amazon listing states DOT and ECE 22.05 certification but does not explicitly claim P/J dual-homologation the way LS2 and Scorpion's listings do. That doesn't necessarily mean the helmet lacks an open-face rating in ECE markets, but since it isn't stated on this listing, we're not claiming it here - treat the chin bar as rated for full-face riding unless Simpson confirms otherwise for your region.
The one-hand flip latch uses metal locking hardware rather than a plastic ratchet, which is a durability choice more than a weight one - it adds a small amount of mass over a plastic latch but is less likely to develop play over years of use. Pre-routed wiring channels and wide ear pockets make this one of the more comms-friendly shells on this list if you're planning to add a Sena or Cardo unit later.
This is also the most expensive helmet in this roundup, which tracks with Simpson's positioning as a boutique brand rather than a volume manufacturer. Riders choosing between this and the LS2 Advant X Carbon are mostly choosing between two different carbon-shell weight numbers within about 150 grams of each other and two very different styling directions - Simpson's streetfighter aesthetic versus LS2's touring-oriented shape.
- Weight:About 1,615g / 3.56 lb (per Simpson's published spec)
- Shell Material:Woven carbon fiber
- Certification:DOT and ECE 22.05 (P/J not specified in the listing)
- Modular System:One-hand flip chin bar with metal locking hardware
- Visor:Pinlock-ready shield, one clear shield included, tinted shields sold separately
- Comms:Pre-routed wiring channels, wide ear pockets for Sena/Cardo units
- Best For:Riders who want Simpson's racing-derived styling in a genuinely light carbon shell
Sena Impulse Smart Modular Helmet
Sena's own spec sheet lists the DOT version of the Impulse at 1,760 grams plus or minus 50 grams for a medium shell. That number includes the helmet's built-in mesh intercom radio, Harman Kardon speakers, microphone, and battery - hardware that a rider adding a bolt-on Sena or Cardo unit to any other helmet on this list would be strapping on separately, at a similar weight cost.
Framed that way, the Impulse's weight is more competitive than it looks at first glance: it lands lighter than the Bell SRT Modular and the Scorpion EXO-GT930 below despite carrying electronics those two helmets don't have. A rider who wants intercom capability gets it here without stacking a second accessory's weight on top of a passive shell.
The listing does not state an ECE rating or P/J open-face homologation for this DOT SKU - only DOT FMVSS 218 compliance. Sena does sell an ECE-homologated version of the Impulse in other markets, but that is a separate SKU from the one available here, so we're not attributing that certification to this specific listing.
The magnetic pogo charging port and voice-assistant access ( "Hey Google"/"Hey Siri") are conveniences that only make sense once you factor in the intercom hardware - this is not a helmet you buy for pure weight, it's one you buy if the intercom is a requirement and you'd rather it be integrated than bolted on.
- Weight:1,760g ± 50g, DOT version (per Sena's published spec)
- Shell Material:Composite/polycarbonate shell with integrated electronics bay
- Certification:DOT (FMVSS 218); no ECE P/J homologation listed on this SKU
- Comms:Integrated mesh intercom, Harman Kardon speakers, voice assistant access
- Visor:Retractable internal sun visor, magnetic pogo charging port
- Fit:Intermediate Oval
- Best For:Riders who want built-in group communication without adding a bolt-on comm unit's weight
Bell SRT-Modular Helmet
Bell advertises the SRT-Modular at 3.89 pounds, which works out to roughly 1,764 grams - heavier than the carbon picks above but not far off the Sena Impulse despite carrying no built-in electronics. Bell doesn't break out the exact fiber blend in its listing beyond "fiberglass composite," so unlike the carbon helmets on this list, there isn't a specific weight-saving material story here.
The standout feature is the eyewear arm pockets woven directly into the interior liner, which is a detail most modular helmets leave out entirely. For riders who wear prescription glasses or sunglasses, that's a meaningful comfort feature that has nothing to do with weight but is worth knowing about at this price point.
The listing states the helmet meets both DOT FMVSS 218 and ECE 22.06 but does not explicitly claim P/J dual-homologation the way LS2's and Scorpion's listings do. Riders who specifically need a documented open-face rating should treat this helmet as full-face-only until Bell states otherwise for this SKU.
The Panovision shield with Class 1 optics is aimed at reducing distortion in a tucked riding position, which matters more on a sportier or more aggressive-geometry bike than on a relaxed touring stance. It's a helmet built more around visibility and eyewear compatibility than around shaving grams.
- Weight:About 3.89 lb / 1,764g (Bell's advertised weight)
- Shell Material:Fiberglass composite
- Certification:DOT and ECE 22.06 (P/J not specified in the listing)
- Eyewear:Woven-in eyewear arm pockets for prescription glasses or sunglasses
- Visor:Panovision shield, Class 1 optics
- Sizes:XS-3XL
- Best For:Glasses-wearing riders who want a mid-weight, mainstream-brand modular
ScorpionEXO GT930 Transformer Modular Helmet
The GT930's Amazon listing states dual homologation - "DOT & ECE 22.06 P/J" - directly in its safety bullet, which is the same explicit open-face certification LS2 states for the Advant X line. Independent retailer spec sheets put the weight at about 4 pounds 1 ounce, or roughly 1,843 grams, for a size Large shell, which makes it the heaviest helmet in this roundup by a modest margin.
Scorpion builds the shell from what it calls Advanced Polycarbonate rather than a fiberglass or carbon composite, paired with dual-density EPS. That's a more budget-friendly shell material than any of the carbon or fiberglass options above, and the weight difference reflects that - this is not a helmet chasing a weight record, it's one built to hit a price point while still clearing the P/J certification bar.
The Ellip-Tec ratchet shield system is a genuine convenience feature: it uses an elliptical motion to pull the shield tight against the eye port for a better seal, and Scorpion's Everclear coating is applied to both surfaces of the shield rather than just the outer face, which helps with fogging on the inside during stop-and-go riding.
At well under half the price of the Shoei below and about half the price of the Sena Impulse, this is the value pick in the group - not because it's especially light, but because it delivers a legitimate P/J-rated modular with EXO-COM Bluetooth compatibility for meaningfully less money than the rest of this list.
- Weight:About 4 lb 1 oz / 1,843g, size Large (per retailer spec sheets)
- Shell Material:Advanced Polycarbonate
- Certification:DOT and ECE 22.06, P/J dual-homologated
- Visor:Ellip-Tec ratchet shield system, Everclear no-fog coating, includes drop-down sun visor
- Comms:EXO-COM ready, large speaker pockets
- Sizes:XS-3XL
- Best For:Riders who want P/J certification and EXO-COM compatibility at the lowest price in this roundup
Shoei Neotec II Modular Helmet
The Neotec II is the heaviest helmet in this roundup at 1,855 grams for a size Medium, and it's included specifically to make that point: even a helmet from a brand as respected for engineering as Shoei doesn't get to carbon-shell weight numbers without using carbon. Shoei builds the shell from its AIM fiberglass composite, which the brand's own marketing describes as "robust yet lightweight" - true relative to a basic polycarbonate shell, but not competitive with the carbon picks at the top of this list.
This listing states DOT-218 certification only, with no ECE or P/J open-face rating mentioned. That's a meaningful difference from the LS2 and Scorpion picks above, which explicitly state P/J dual-homologation - riders who specifically want a documented open-face rating should look higher on this list rather than assuming the Neotec II carries one.
What the Neotec II trades weight for is refinement: it's frequently cited among the quietest modular helmets on the market, with a chin curtain, refined shield seal, and ventilation system tuned for long highway stints rather than raw airflow. That's a legitimate tradeoff for touring riders who spend more hours in the saddle than most, where noise fatigue matters as much as helmet mass.
If pure weight is the only variable that matters, this isn't the helmet on this list to buy. If quiet, all-day comfort and Shoei's fit-and-finish matter as much as grams, it remains a helmet worth the premium - just go in knowing it's the heaviest pick here, not the lightest.
- Weight:1,855g / 4.09 lb, size Medium (per retailer spec sheets)
- Shell Material:Shoei AIM (Advanced Integrated Matrix) fiberglass composite
- Certification:DOT-218; no P/J open-face rating listed on this US SKU
- Visor:QSV-1 internal sun shield, anti-fog and anti-scratch
- Noise:Advanced ventilation and noise-reduction engineering, widely cited as one of the quietest modulars
- Sizes:XS-2XL
- Best For:Riders prioritizing refinement and quiet over the lowest possible weight
Why Modular Helmets Weigh More Than Full-Face
A full-face helmet is a single closed shell with one visor. A modular helmet has to add a pivoting chin bar, a locking latch mechanism strong enough to hold that chin bar shut in a crash, and in most cases a second internal sun visor with its own actuator. None of that is optional weight you can engineer away - it's the mechanical cost of the flip-up feature the helmet is built around. That's why, size for size and certification for certification, a modular from any given brand will almost always outweigh that brand's own full-face helmet.
The hinge, the latch, and the second visor
The chin bar itself is usually the single heaviest component difference between a modular and a full-face helmet - it needs its own structural reinforcement to pass impact testing in both the open and closed position, plus the pivot hardware and latch. That's also why a carbon chin bar, not just a carbon crown, matters more than marketing copy might suggest: LS2 specifically calls out a "full carbon chin bar" on its Advant X Carbon, and that's the component doing most of the weight-saving work.
Carbon vs. Composite Shells: Where the Weight Actually Goes
Woven carbon fiber is stiffer per gram than fiberglass composite or polycarbonate blends, which lets manufacturers use less material to hit the same impact-energy targets. On this list, that difference is visible in a clean, apples-to-apples comparison: LS2's Advant X Carbon (1,470g) and its composite-shell Advant X sibling (1,600g) share the same mold, mechanism, and certification, and the carbon version simply weighs about 130 grams less. Scale that difference up against a fiberglass shell like Shoei's AIM composite or a straight polycarbonate shell like Scorpion's, and the gap between a carbon modular and a budget composite modular widens to 300-400 grams.
That said, carbon isn't free - it's the reason the two lightest helmets on this list, from LS2 and Simpson, also sit in the middle-to-top of the price range here. Riders who want the flip-up convenience without paying a carbon premium are better served by a composite shell like the LS2 Advant X (non-Carbon) or Scorpion GT930, both of which still carry full DOT/ECE certification.
P/J Homologation: What "Rated to Ride Open" Actually Means
DOT's FMVSS 218 standard, which every helmet on this list meets, does not separately test or certify a helmet for riding with the chin bar open. That's an ECE concept: under ECE 22.05 and 22.06, a helmet can earn a "P" rating (protective - full-face only), a "J" rating (jet - open-face only), or a dual "P/J" rating that certifies it as safe in both configurations. A modular helmet without a stated P/J dual rating should be treated as a full-face-only helmet - riding with the chin bar up on a P-only or DOT-only helmet may not be illegal depending on your jurisdiction, but it also hasn't been tested and certified for that position, which is a different thing than being certified safe.
Check the certification row in the comparison table below before assuming any given modular is rated for open riding. On this list, LS2's Advant X Carbon, the composite Advant X, and Scorpion's GT930 all explicitly state P/J dual-homologation in their listings. Simpson, Sena, Bell, and Shoei's listings for the specific SKUs sold here do not make that claim, which doesn't necessarily mean the certification doesn't exist somewhere in that brand's lineup - it means it isn't stated for the product you'd actually be buying.
Weight vs. Quietness and Features: The Real Tradeoff
The lightest modular helmet on the market today is AGV's Sportmodular, a full-carbon flip-up that AGV lists at 1,295 grams - roughly 175 grams lighter than the LS2 Advant X Carbon that tops this list. It doesn't appear as a ranked pick here because it currently has no active buyable listing on Amazon, but it's worth knowing about as the benchmark the rest of the category is chasing.
Even at that benchmark weight, though, a modular still isn't going to match a good full-face helmet gram for gram - the mechanism weight doesn't disappear, it just gets minimized. If pure weight is the only priority and the flip-up convenience isn't a requirement, a lightweight full-face helmet will always win that comparison; our guide to the lightest full-face helmets for reducing neck fatigue covers that category directly. For riders who need the chin-bar-up flexibility of a modular for gas stops, drive-throughs, and toll booths, the helmets above represent the closest this category gets to full-face weight without giving up the mechanism that makes a modular a modular in the first place.
Lightest Modular Motorcycle Helmet for 2026 Comparison
| Helmet | Weight | Shell | Certification | Best For |
|---|---|---|---|---|
| LS2 Advant X Carbon Modular Helmet | 1,470g ± 50g (per LS2's listing) | 9K woven carbon fiber, full carbon chin bar | DOT (FMVSS 218) and ECE 22.06, P/J dual-homologated | Riders who want the lightest DOT/ECE-certified modular currently sold on Amazon |
| LS2 Advant X Modular Helmet (Composite Shell) | 1,600g ± 50g (per LS2's listing) | Kinetic Polymer Alloy (KPA), two-shell molding | DOT (FMVSS 218) and ECE 22.06, P/J dual-homologated | Riders who want the Advant X platform without paying the carbon-shell premium |
| Simpson Mod Bandit Carbon Fiber Modular Helmet | About 1,615g / 3.56 lb (per Simpson's published spec) | Woven carbon fiber | DOT and ECE 22.05 (P/J not specified in the listing) | Riders who want Simpson's racing-derived styling in a genuinely light carbon shell |
| Sena Impulse Smart Modular Helmet | 1,760g ± 50g, DOT version (per Sena's published spec) | Composite/polycarbonate shell with integrated electronics bay | DOT (FMVSS 218); no ECE P/J homologation listed on this SKU | Riders who want built-in group communication without adding a bolt-on comm unit's weight |
| Bell SRT-Modular Helmet | About 3.89 lb / 1,764g (Bell's advertised weight) | Fiberglass composite | DOT and ECE 22.06 (P/J not specified in the listing) | Glasses-wearing riders who want a mid-weight, mainstream-brand modular |
| ScorpionEXO GT930 Transformer Modular Helmet | About 4 lb 1 oz / 1,843g, size Large (per retailer spec sheets) | Advanced Polycarbonate | DOT and ECE 22.06, P/J dual-homologated | Riders who want P/J certification and EXO-COM compatibility at the lowest price in this roundup |
| Shoei Neotec II Modular Helmet | 1,855g / 4.09 lb, size Medium (per retailer spec sheets) | Shoei AIM (Advanced Integrated Matrix) fiberglass composite | DOT-218; no P/J open-face rating listed on this US SKU | Riders prioritizing refinement and quiet over the lowest possible weight |
Prefer a fixed chin bar? A full-face with no hinge is always lighter than a modular. See our lightest full-face motorcycle helmets guide.
Frequently Asked Questions
What is the lightest modular motorcycle helmet?
AGV's Sportmodular is the lightest modular currently marketed, with AGV listing its carbon shell at 1,295 grams, though it does not currently have an active buyable listing on Amazon. Among the helmets in this roundup, the LS2 Advant X Carbon is the lightest at 1,470 grams per LS2's published spec, followed closely by the Simpson Mod Bandit Carbon at about 1,615 grams.
Why are modular helmets heavier than full-face helmets?
A modular helmet needs a pivoting chin bar, a locking latch strong enough to hold that chin bar closed in a crash, and usually a second internal sun visor with its own mechanism. A full-face helmet is a single closed shell with none of that hardware, so even the lightest modular typically outweighs a comparable full-face helmet from the same brand.
Does a carbon shell modular really weigh less than a composite one?
Yes, and it's measurable on a same-model comparison: LS2's Advant X Carbon and its composite-shell Advant X sibling share the same mold and mechanism, and the carbon version weighs about 130 grams less per LS2's own published specs. The gap widens against fiberglass or polycarbonate shells from other brands, where the difference can run 300-400 grams.
What does P/J certification mean on a modular helmet?
P/J is an ECE 22.05/22.06 rating system. A "P" rating certifies a helmet as protective in the full-face (chin bar down) configuration, a "J" rating certifies it for open-face (chin bar up) riding, and a dual P/J rating means the helmet has been tested and certified safe in both positions. DOT's FMVSS 218 standard does not test the open-face configuration at all, so a DOT-only modular should be treated as full-face-only unless it also carries a stated P/J rating.
Is a heavier modular helmet less safe?
Not necessarily - weight and safety certification are separate specifications. Every helmet in this roundup meets DOT FMVSS 218 at minimum, and several also meet ECE 22.05 or 22.06, regardless of where they land on the weight scale. Extra weight in a modular is more often a comfort and fatigue factor over a long ride than a safety factor, though a helmet that fits properly and doesn't shift is generally safer than a lighter helmet that fits poorly.
DOT vs ECE vs Snell vs MIPS, how to pick the right lid in 60 seconds, and when to replace it. One page, no fluff.
