The Lid Test

The Best Motorcycle Helmets for Hot Weather

Heat is the reason riders take helmets off, so a summer lid has one job: move enough air that you keep it on. These are ranked on the two things that actually cool a head — how much air the shell moves and how little weight it puts on your neck.

By Stephen V.Last verified How we compare

A helmet does not cool you. Air does. Everything a manufacturer builds into a “summer” helmet is in service of one mechanism: pulling air in at the brow and chin, running it through channels cut into the EPS liner, and pushing it out of exhaust ports at the back where a low-pressure zone drags it clear. When that works, sweat evaporates off your scalp and you stay sharp. When it does not, you get the summer-riding experience everyone knows — a soaked liner, a fogged visor at every light, and a real temptation to ride in a cap.

So this ranking is built on two measurable things and one honest admission. The measurable ones are ventilation design— how many intakes and exhausts the maker publishes, and whether the shell is shaped to exploit them — and weight, because a lighter helmet is a cooler helmet in practice: less mass means less heat retained and less neck fatigue compounding the heat fatigue. The admission is that nobody publishes airflow figures in CFM, and we do not run a wind tunnel, so we rank on published design and construction rather than on a cooling score we invented. Prices in the text are qualitative; the live number is on each buy button.

How this is funded:we earn a commission if you buy through our links, at no extra cost to you. It never changes which helmet we recommend, and we’ll tell you plainly when a cheaper or lighter one is the better buy. Full disclosure.

Quick picks

Ranked on our spec score — certification, weight, features and value. Select a row to jump to the full write-up. We have not tested these helmets; here is exactly how we compare them instead.

#HelmetBest forOur scorePrice
1

HJC RPHA 11 Pro

The value sport helmet that keeps showing up on best-of lists for a reason: a PIM+ carbon-blend shell at a published ~1,417 g in medium, an enlarged eye port, and tool-less shield changes — at roughly half a premium flagship's price.

Best overall8.6
2
Shoei X-Fifteen

Shoei X-Fifteen

Shoei's race flagship — the Marquez lid — with DOT, ECE 22.06 and Snell M2025R, wind-tunnel aero and seven closable intakes. It is built for a tucked track position, which is exactly why it is not the one to buy for upright commuting.

Most vents9.0
$979.99 · View on Amazon

Price as of August 31, 2026. #ad How we’re funded

3
AGV K6 S

AGV K6 S

A carbon-aramid shell at roughly 1,255 g makes the K6 S one of the lightest DOT-and-ECE-22.06 full-faces you can buy, with a genuinely wide 190-degree eye port. If you notice helmet weight on a long day, this is the short list.

Best lightweight9.1
$639.00 · View on Amazon

Price as of August 31, 2026. #ad How we’re funded

4
Scorpion EXO-GT930 Transformer

Scorpion EXO-GT930 Transformer

The trick here is a genuinely removable chin bar — the GT930 runs as a full-face or, with the bar off, a proper open-face, which few modulars actually allow. Add a sun visor and a sub-$300 price and it's the value convertible.

Best for slow, hot riding7.9
$279.95 · View on Amazon

Price as of August 31, 2026. #ad How we’re funded

5
Klim Krios Pro

Klim Krios Pro

The benchmark ADV lid for a reason: a full carbon shell at a published 1,450 g in Large makes it one of the lightest adventure helmets made, and it reconfigures for street, adventure, dual-sport or dirt without buying a second helmet.

Best adventure9.1
$600.99 · View on Amazon

Price as of August 31, 2026. #ad How we’re funded

6
LS2 Stream II

LS2 Stream II

The value pick that punches above its ~$150 price: DOT and ECE 22.06 certification, a built-in drop-down sun visor, and LS2's AREM rotational-energy management — features usually reserved for helmets costing twice as much.

Best budget8.2
$149.98 · View on Amazon

Price as of August 31, 2026. #ad How we’re funded

The picks in full

#1Best overallOur score8.6

HJC RPHA 11 Pro

The value sport helmet that keeps showing up on best-of lists for a reason: a PIM+ carbon-blend shell at a published ~1,417 g in medium, an enlarged eye port, and tool-less shield changes — at roughly half a premium flagship's price.

Strengths

  • PIM+ carbon-fiberglass-aramid shell is light — Rider Magazine cites 3 lb 2 oz (~1,417 g) in medium
  • Enlarged eye port and full front-to-back ACS ventilation aimed at track use
  • RapidFire II tool-less shield swaps make a tinted or clear change a 10-second job

Trade-offs

  • Certified to the older ECE 22.05 (plus DOT), not the newer 22.06 protocol
  • No internal sun visor
CertificationsDOT, ECE 22.05
Weight1417 g
ShellPIM+ (carbon, fiberglass and aramid hybrid)
Head shapeNot published
SizesXS-2XL
Internal sun visorNo
Pinlock-readyYes

Notable. ACS full airflow; enlarged eye port; RapidFire II tool-less shield

Specs read from the manufacturer / retailer listing, on July 19, 2026. “Not published” means the maker does not state that figure.

#2Most ventsOur score9.0

Shoei X-Fifteen

Shoei's race flagship — the Marquez lid — with DOT, ECE 22.06 and Snell M2025R, wind-tunnel aero and seven closable intakes. It is built for a tucked track position, which is exactly why it is not the one to buy for upright commuting.

Strengths

  • Triple-certified: DOT, ECE 22.06 and the race-specific Snell M2025R
  • Wind-tunnel aero — Shoei cites a 6.1% drag reduction over the X-14 — with 7 intakes and 6 exhausts
  • Adjustable, replaceable interior and E.Q.R.S. emergency cheek-pad release

Trade-offs

  • Aero and airflow are tuned for a tucked posture; less ideal fully upright
  • One of the most expensive helmets here — you're paying for the race pedigree
CertificationsDOT, ECE 22.06, Snell M2025R
Weight1624 g
ShellAIM+ six-ply matrix (fiberglass with organic and high-performance fibers)
Head shapeIntermediate oval
SizesXS-2XL
Internal sun visorNo
Pinlock-readyYes

Notable. Wind-tunnel aerodynamics; 7 intakes / 6 exhausts; race-position interior

Specs read from the manufacturer / retailer listing, on July 19, 2026. “Not published” means the maker does not state that figure.

#3Best lightweightOur score9.1

AGV K6 S

A carbon-aramid shell at roughly 1,255 g makes the K6 S one of the lightest DOT-and-ECE-22.06 full-faces you can buy, with a genuinely wide 190-degree eye port. If you notice helmet weight on a long day, this is the short list.

Strengths

  • Carbon-aramid shell — AGV's published 1,255 g is class-leadingly light for the segment
  • Certified to ECE 22.06, the newest standard with rotational and multi-point impact testing
  • Ultravision visor gives a 190-degree horizontal field of view and ships Pinlock-ready

Trade-offs

  • No internal sun visor — a tinted shield is a separate purchase
  • Sport-leaning fit and shell shape suit an intermediate-oval head best
CertificationsDOT, ECE 22.06
Weight1255 g
ShellCarbon-aramid fiber
Head shapeIntermediate oval
SizesXS-2XL
Internal sun visorNo
Pinlock-readyYes

Notable. 190-degree Ultravision visor (Optical Class 1); 5-density EPS; ARK comms-ready

Specs read from the manufacturer / retailer listing, on July 19, 2026. “Not published” means the maker does not state that figure.

#4Best for slow, hot ridingOur score7.9

Scorpion EXO-GT930 Transformer

The trick here is a genuinely removable chin bar — the GT930 runs as a full-face or, with the bar off, a proper open-face, which few modulars actually allow. Add a sun visor and a sub-$300 price and it's the value convertible.

Strengths

  • Removable chin bar converts between full-face and open-face configurations
  • SpeedView drop-down internal sun visor and EXO-COM Bluetooth-ready pockets
  • DOT and ECE 22.05 certified at a budget price; includes a detachable peak

Trade-offs

  • Certified to the older ECE 22.05, not 22.06
  • Polycarbonate shell is heavy (~1,814 g) — one of the weightier lids here
CertificationsDOT, ECE 22.05
Weight1814 g
ShellAdvanced polycarbonate
Head shapeIntermediate oval
SizesXS-3XL
Internal sun visorYes
Pinlock-readyNo

Notable. Removable chin bar (full-face to open-face); SpeedView sun visor; EXO-COM-ready

Specs read from the manufacturer / retailer listing, on July 19, 2026. “Not published” means the maker does not state that figure.

#5Best adventureOur score9.1

Klim Krios Pro

The benchmark ADV lid for a reason: a full carbon shell at a published 1,450 g in Large makes it one of the lightest adventure helmets made, and it reconfigures for street, adventure, dual-sport or dirt without buying a second helmet.

Strengths

  • Full carbon shell — 1,450 g in Large is remarkably light for an ADV helmet with a peak
  • DOT and ECE 22.06, plus Koroyd energy-absorbing structure
  • Four ride modes (street, ADV, dual-sport, dirt) and a photochromic shield included

Trade-offs

  • Premium price — you're paying for carbon and versatility
  • No internal sun visor (the photochromic shield does that job instead)
CertificationsDOT, ECE 22.06
Weight1450 g
ShellFull carbon fiber (hand-laid)
Head shapeIntermediate oval
SizesXS-3XL
Internal sun visorNo
Pinlock-readyNo

Notable. Koroyd construction; four ride modes; photochromic shield; goggle-compatible

Specs read from the manufacturer / retailer listing, on July 19, 2026. “Not published” means the maker does not state that figure.

#6Best budgetOur score8.2

LS2 Stream II

The value pick that punches above its ~$150 price: DOT and ECE 22.06 certification, a built-in drop-down sun visor, and LS2's AREM rotational-energy management — features usually reserved for helmets costing twice as much.

Strengths

  • ECE 22.06 certified at a budget price — the newest standard, rarely found this cheap
  • Built-in drop-down sun shield, which most premium full-faces here don't have
  • Pinlock-ready face shield and a rear spoiler with flow-through ventilation

Trade-offs

  • Kinetic Polymer Alloy shell is heavier and less premium than a composite lid
  • Fit and finish are good for the price, not flagship-grade
CertificationsDOT, ECE 22.06
Weight1550 g
ShellKinetic Polymer Alloy (KPA)
Head shapeIntermediate oval
SizesXS-3XL
Internal sun visorYes
Pinlock-readyYes

Notable. AREM rotational-energy management; drop-down sun visor; Pinlock-ready shield

Specs read from the manufacturer / retailer listing, on July 19, 2026. “Not published” means the maker does not state that figure.

How we ranked these

Vent count and vent architecture first.A helmet with seven intakes and six exhausts is not marginally better ventilated than one with two and one — it is a different design brief. We took the intake and exhaust counts each maker publishes, and gave weight to helmets whose shells are built around airflow rather than having vents added to a closed shape.

Weight second.Composite and carbon shells run several hundred grams lighter than polycarbonate, and on a 95-degree day that difference stops being abstract. A 1,255 g helmet after two hours in traffic is a materially different experience from an 1,800 g one. Every weight we quote comes from the manufacturer’s own page.

Configuration third.The most effective hot-weather feature is not a vent at all — it is the ability to open the helmet up when you are moving slowly enough that no vent can help. Below roughly 25 mph there is not enough dynamic pressure to drive meaningful airflow through any full-face, which is why a removable chin bar earns a place here on its own merits.

Match the pick to your summer

The HJC RPHA 11 Prois our overall pick because it is the best balance of the three criteria. HJC’s ACS full-airflow system is a front-to-back airflow path rather than a set of holes, the PIM+ carbon-fiberglass-aramid shell keeps it at a published 1,417 g, and it costs meaningfully less than the flagships. It is the summer helmet we would put most riders in, and the RPHA 11 Pro against the AGV K6 S is the comparison worth reading before you commit.

The Shoei X-Fifteenhas the most ventilation on this page by a distance — seven intake vents and six exhaust vents, developed in Shoei’s own wind tunnel for riders working hard in a tucked position. It is also a $980 race helmet with a race interior, so it is the right answer for hot track days and the wrong one for a commute. The AGV K6 S takes the weight route instead: at a published 1,255 g of carbon-aramid it is the lightest lid we rank, and its 190-degree eye port means more open air across your face. It carries ECE 22.06.

The Scorpion EXO-GT930 Transformeris on this list for a reason no vent count captures: the chin bar comes off. In stop-and-go summer traffic, where no full-face ventilates because you are not moving fast enough to force air through it, running as an open-face is the only thing that genuinely works — then the chin bar goes back on for the highway leg. It is heavy and it is polycarbonate, and it is still the most effective hot-weather helmet here for city riding. Riders on cruisers should also see the cruiser roundup.

For riding that leaves pavement, the Klim Krios Pro is the answer: adventure helmets are the best-ventilated category in motorcycling because they are designed for slow, hot, high-effort riding, and the Krios Pro adds a hand-laid carbon shell with Koroyd tubing and four configurable ride modes at a published 1,450 g. And the LS2 Stream IIis the budget pick — a drop-down sun visor matters more in summer than in any other season, and getting that plus ECE 22.06 for under $200 is the sensible answer for a second summer lid. The wider value field is in the budget roundup.

What actually keeps you cool, in order

Ride when it is cooler, and hydrate before you are thirsty. No helmet solves noon in July. Heat exhaustion on a bike is a genuine crash risk and it arrives as poor judgment before it arrives as discomfort.

Open every vent, and check they are open. Vent sliders get closed in winter and stay closed. It sounds trivial; it is the single most common reason a well-ventilated helmet performs like a sealed one.

Wear a thin balaclava or skull cap.Counter-intuitive, but a wicking layer moves sweat off your scalp to where moving air can evaporate it, instead of letting it pool in the comfort liner. It also keeps the liner cleaner, which matters more in summer than at any other time — our cleaning guide covers washing one properly.

Do not size up for comfort.The instinct in heat is to buy a looser helmet. A loose helmet is louder, moves on your head, and protects worse — and it does not run cooler, because airflow is driven by the vent channels, not by slack around your ears. Get the size right and let the vents do the work.

Two cheap things that make a hot ride better

Heat and noise compound each other — an hour of wind roar in 95-degree air is far more tiring than either alone. Neither of these costs helmet money, and a fresh liner in summer is not optional.

We haven’t tested these any more than we’ve tested the helmets — they’re here because they solve the problem this page is about, and they’re cheap enough to be worth saying so. Prices are live and dated on each button.

  • Alpine MotoSafe Tour earplugs

    Alpine MotoSafe Tour earplugs

    Wind noise — the fix that does more than a quieter helmet does

    Filtered riding plugs rather than foam: the point is to cut the wind roar without deleting the engine, your intercom and the traffic around you. This is Alpine's road/touring filter rather than the Race version, which is the right way round for all-day riding.

    $19.95 · View on Amazon

    Price as of August 31, 2026. #ad How we’re funded

  • Alpinestars open-face balaclava

    Alpinestars open-face balaclava

    A liner that gets sweaty far faster than you'll wash it

    A thin layer between your head and the padding. The liner stays cleaner for longer, the helmet slides on more easily, and it takes the edge off a cold start — from the same maker as the gloves and jacket at the top of our gear rankings.

    $34.41 · View on Amazon

    Price as of August 31, 2026. #ad How we’re funded

Frequently asked questions

What makes a motorcycle helmet good in hot weather?

Airflow and weight. A good summer helmet has multiple intake vents at the brow and chin, channels cut through the EPS liner to route that air across your scalp, and exhaust vents at the rear where low pressure pulls it out. Weight matters almost as much — a composite shell several hundred grams lighter than polycarbonate is noticeably less tiring in heat, and fatigue compounds fast on a hot day. A drop-down sun visor is a third practical advantage, since summer means the brightest riding of the year.

Are open-face helmets cooler than full-face?

Yes, substantially — and that is the trade-off. An open-face puts moving air directly on your face, which no full-face vent system can match, especially below about 25 mph where there is not enough dynamic pressure to drive air through a closed shell. But you give up chin-bar protection, and a significant share of helmet impacts land on the chin. The Scorpion EXO-GT930 on this list is the compromise: a full-face whose chin bar removes, so you can run open in town and closed on the highway.

Does a lighter helmet feel cooler?

In practice, yes, though not because it moves more air. A lighter shell retains less heat and, more importantly, puts less load through your neck — and neck fatigue and heat fatigue compound each other on a long summer ride. The AGV K6 S at a published 1,255 g versus a polycarbonate lid around 1,800 g is a difference you feel by the second hour. See our lightest-helmets ranking if weight is your priority.

Should I buy a lighter-colored helmet for summer?

A white or light-colored shell absorbs less solar radiation than a black one, so it will run cooler sitting in the sun and marginally cooler while riding. The effect is real but small compared with ventilation and weight — do not choose a poorly-ventilated white helmet over a well-ventilated black one. Light colors also carry a conspicuity benefit in traffic, which is a better reason to pick one.

Do helmet vents actually work at low speed?

Barely. Vent systems rely on the pressure difference created by forward motion, and below roughly 25 mph there is not enough of it to drive useful airflow through a full-face. That is why stop-and-go summer traffic is the worst case for any helmet, and why a convertible or modular that opens up is genuinely more effective in town than a race-vented full-face. On the highway, the good ventilation systems on this page work exactly as advertised.

How do I stop my helmet liner smelling in summer?

Take the liner out and wash it. Every helmet on this list has a removable, washable comfort liner, and summer sweat degrades one fast — a monthly wash in mild soap and cold water, air-dried out of direct sun, is enough. Wearing a thin balaclava or skull cap under the helmet dramatically slows how fast the liner soils in the first place. Our helmet-cleaning guide covers the shell, visor and liner routine.

Sources

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