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best full-face MTB helmets 2026

Best full-face MTB helmets 2026: 10 top picks for trail, enduro and bike-park riding

If you are searching for the best full-face MTB helmets 2026 has to offer, you are probably riding faster, steeper or rougher terrain than a standard open-face trail helmet is really built for. That might mean regular red and black trail-centre routes, uplift days, bike-park laps, enduro racing, winter eMTB rides or simply local descents where wet roots, slick rock and awkward ruts make crashes more unpredictable.

A good full-face mountain bike helmet can make a real difference to confidence. It gives more coverage around the jaw, cheeks and lower face than an open-face helmet, which can feel reassuring when the trail gets steeper or speeds rise. But the best full-face MTB helmet is not always the heaviest or most downhill-focused option. Modern full-face helmets now split into several useful categories, from lightweight enduro helmets you can pedal in all day to more substantial gravity lids built for uplift days and harder descending.

That distinction matters for UK riders. If you ride an eMTB, you do not need a specific eMTB helmet, but the way you ride may make a full-face more appealing. Assisted climbs often mean more laps, more descending and more time on rough ground. That does not automatically mean you need a downhill helmet, but it does mean breathability, fit stability, goggle compatibility and comfort under repeated efforts matter.

Fit is still the most important thing. A full-face helmet should feel snug without painful pressure points. Your cheeks should be lightly supported, the helmet should sit level and low enough on the forehead, and it should not rock when you move your head. If a helmet does not fit your head shape, it is not the right choice, even if it looks perfect on paper.

This guide focuses on dedicated full-face MTB helmets rather than removable-chin-bar designs. If you want one helmet that can switch between open-face and full-face modes, read our best convertible MTB helmets 2026 guide. If you are still deciding what type of lid you need, our wider best MTB helmets 2026 guide is the best place to start.

The best full-face MTB helmets shortlisted

Bell Sanction 2 DLX— £99.99 (RRP £179.99)
Endura SingleTrack Full Face Helmet – £109 (RRP £160)
Fox Rampage — £159.99 (RRP £224.99)
Troy Lee Designs Stage — £168 (RRP £299.99)
Smith Mainline — £179.99 (RRP £285)

Giro Insurgent Spherical – £179.99 (RRP £349.99)
Giro Coalition Spherical – £184.99 (RRP £299.99)
Leatt Gravity 4.0 – £188.99 (RRP £209.99)
Fox Proframe RS — £199.99 (RRP £329.99)
POC Otocon Race — £209.99 (RRP: £300)

What type of full-face MTB helmet do you need?

The best full-face MTB helmet depends on how you ride. If you are pedalling to the top, mixing climbs with descents and wearing the helmet for long periods, an enduro full-face helmet usually makes most sense. These helmets tend to be lighter, better ventilated and more comfortable for normal trail riding than old-school downhill lids.

If you mainly ride uplift days, bike parks, downhill tracks or high-speed descents, a gravity-focused full-face helmet may be the better choice. These usually feel more substantial and planted, with a greater emphasis on downhill confidence than climb-friendly ventilation.

For eMTB riders, the answer often sits somewhere between the two. You may do more descending than you would on a normal mountain bike, but you may still be pedalling for most of the ride. That makes breathable enduro full-face helmets especially useful for UK eMTB riding, although regular bike-park riders may still prefer a more downhill-focused lid.

The best full-face MTB helmets 2026

Bell Sanction 2

Bell Sanction 2

£99.99 (RRP £179.99)

The Bell Sanction 2 DLX Mips is the best starting point in this guide if you want an affordable full-face MTB helmet with recognised rotational impact protection. The standard Sanction 2 can often be found for less money, but the DLX Mips version is the one that makes most sense for this guide because it gives budget-conscious riders a stronger safety package.

This helmet suits riders stepping up from an open-face trail helmet who want more confidence for trail centres, steeper local descents, pump tracks or occasional bike-park days. It has a more gravity-led shape than the lightest enduro full-face helmets, so it feels like a proper full-face rather than a trail helmet with extra coverage.

The Sanction 2 DLX Mips is not the most ventilated or refined helmet here. If you regularly pedal in a full-face for long climbs, a lighter enduro-focused option such as the Troy Lee Designs Stage, Smith Mainline or POC Otocon Race will feel easier to live with. But if your priority is getting a proper full-face mountain bike helmet at a realistic price, it is a very sensible place to start.

For riders who only wear a full-face for occasional bike-park trips or more intimidating trail-centre days, this is the sort of helmet that can make full-face protection feel accessible without jumping straight into premium pricing.

Pros

Strong value for a Mips-equipped full-face MTB helmet

Good first full-face for trail centres and occasional bike-park riding

More reassuring coverage than an open-face trail helmet

Useful option for riders who do not wear a full-face every ride

Cons

Less ventilated and refined than pricier enduro full-face helmets

Specifications

Type: Full-face MTB helmet

Rotational protection: Yes Mips

Shell: Full-face shell construction

Fit system: Padding-based fit

Ventilation: Fixed vents

Visor: Fixed peak

Goggle compatibility: Yes

Endura SingleTrack Full Face Helmet - 
best trail MTB helmets 2026

Endura SingleTrack Full Face Helmet

£109 (RRP £160)

The Endura SingleTrack Full Face Mips is one of the most useful budget full-face MTB helmets for UK trail riding because it feels genuinely trail-focused rather than simply cheap. It is aimed at riders who want the reassurance of a full-face for trail centres, steeper natural descents and eMTB laps, but who do not want to jump straight into premium enduro pricing.

The key difference over many basic full-face helmets is usability. The SingleTrack Full Face Mips has large vents, a micro-adjust fit system, removable padding and a goggle-friendly layout with a rear strap gripper. Those details matter on real UK rides, where you might be climbing one minute, dropping into a wet rooty descent the next, then stopping to wipe mud from goggles.

As a first serious full-face mountain bike helmet, the Endura covers the practical basics well. Mips protection is included, the fit system makes it easier to stabilise than a simple pad-only helmet, and the ventilation makes it more realistic for pedalled riding than a pure downhill lid.

It is not as light, polished or premium-feeling as the more expensive enduro helmets in this guide, but it is a very convincing value choice. If you want an affordable full-face MTB helmet that you can actually wear on mixed rides, not just keep for rare uplift days, this is one of the strongest options.

Pros

Strong value for a Mips-equipped full-face helmet

Large vents make it more trail-friendly than many budget lids

Micro-adjust fit system helps with stability

Goggle-friendly design suits winter and wet UK riding

Cons

Less premium-feeling than higher-end enduro full-face helmets

Specifications

Type: Full-face MTB helmet

Rotational protection: Mips

Shell: Lightweight in-mould construction

Fit system: One-handed micro-adjust fit system

Ventilation: Large fixed vents

Visor: Fixed peak

Goggle compatibility: Yes, with rear strap gripper

Fox Rampage

Fox Rampage

£159.99 (RRP £224.99)

The Fox Rampage Mips is the first helmet in this guide that starts to feel more gravity-focused. It is a strong choice if your riding includes bike parks, uplift days, harder trail-centre descents or faster eMTB laps where you want a more substantial full-face feel than a lightweight pedal-friendly lid can provide.

Fox positions the Rampage as an accessible downhill-style full-face helmet, and that gives it a clear job. It is not trying to be the airiest all-day enduro helmet. Instead, it is designed for riders who want a stronger, more planted feel for descending confidence without paying premium race-helmet money.

For UK use, that makes it especially useful if you ride bike parks, uplift days, rough trail-centre descents or local steep tracks where you are not spending hours continuously climbing in the helmet. It will still work for mixed rides, but it is better suited to gravity-led sessions than warm summer pedalling loops.

The Rampage Mips also benefits from a simple, familiar Fox design. It looks like a proper full-face, has Mips rotational protection and offers good goggle compatibility. If your priority is descending confidence at a sensible price, it deserves a place on the shortlist.

Pros

Strong value for a gravity-focused full-face helmet

Mips protection included

Good choice for bike parks, uplift days and faster descending

More substantial feel than lightweight enduro full-face helmets

Cons

Less pedal-friendly than lighter, better-ventilated enduro options

Specifications

Type: Gravity-focused full-face MTB helmet

Rotational protection: Mips

Shell: Injection-moulded ABS shell

Fit system: Traditional full-face fit with padding

Ventilation: 360-degree ventilation layout

Visor: Adjustable, goggle-compatible visor

Goggle compatibility: Yes

Troy Lee Designs Stage - 
best trail MTB helmets 2026

Troy Lee Designs Stage

£168 (RRP £299.99)

The Troy Lee Designs Stage Mips remains one of the best-known enduro full-face helmets because it helped make the pedal-friendly full-face category feel normal. It is aimed at riders who want more coverage than an open-face helmet, but who still need enough ventilation and comfort to wear the helmet on proper trail rides.

That makes it a very good fit for UK riding. Many riders do not spend the whole day descending, but they still encounter steep, rough and unpredictable sections where full-face coverage feels sensible. The Stage is designed for exactly that kind of use: climb, traverse, descend and repeat.

It is also a strong match for eMTB riders. Assisted climbing can mean more laps and more descending in the same amount of time, so a breathable full-face that does not feel like a downhill helmet on every climb can be a smart upgrade. The Stage gives that balance better than many heavier full-face lids.

The trade-off is that it is not the most downhill-focused helmet here. If your riding is mostly uplift days or bike parks, the Fox Rampage, Giro Insurgent or Leatt Gravity 4.0 may feel more planted. But for all-day enduro riding, mixed trail-centre laps and technical UK singletrack, the Troy Lee Designs Stage remains one of the most useful full-face helmets in the category.

Pros

Excellent pedal-friendly enduro full-face option

Good ventilation for longer rides

Strong choice for eMTB riders doing repeated trail laps

Lightweight feel compared with gravity-focused helmets

Cons

Not as substantial-feeling as a dedicated downhill helmet

Specifications

Type: Enduro full-face MTB helmet

Rotational protection: Mips

Shell: Lightweight full-face construction

Fit system: Interior padding fit system

Ventilation: Large enduro-focused vent layout

Visor: Adjustable peak

Goggle compatibility: Yes

Smith Mainline

Smith Mainline

£179.99 (RRP £285)

The Smith Mainline Mips is one of the best full-face MTB helmets for riders who want a breathable enduro lid that still feels stable on proper descents. It sits in the sweet spot between lightweight trail usability and full-face reassurance, which is exactly where many UK riders need their helmet to be.

The Mainline uses Smith’s Koroyd protection alongside Mips, and it comes with a customisable fit approach using different pads. That matters because full-face helmet fit is very personal. A helmet that feels perfect for one rider can feel wrong for another, so being able to fine-tune the fit is a genuine advantage.

On the trail, the Mainline makes most sense for riders who pedal, climb and descend in the same ride. It is not a pure downhill helmet, but it gives enough coverage and stability for aggressive trail riding, enduro-style routes and eMTB sessions where you are doing lots of descending but still spending plenty of time moving between trails.

It is also a strong choice if you already use Smith goggles or glasses, because the brand’s eyewear integration is usually excellent. If you want a full-face mountain bike helmet that feels considered, breathable and properly trail-focused, the Mainline is one of the safest premium-leaning choices.

Pros

Excellent enduro full-face option for mixed UK riding

Koroyd and Mips protection

Customisable pad fit helps dial in comfort

Good Smith eyewear and goggle compatibility

Cons

Not as gravity-heavy as a dedicated downhill helmet

Specifications

Type: Enduro full-face MTB helmet

Rotational protection: Koroyd and Mips protection

Shell: Full-face shell with Koroyd protection

Fit system: Customisable pad fit system

Ventilation: AirEvac ventilation system

Visor: Adjustable visor

Goggle compatibility: Yes

Giro Insurgent Spherical

Giro Insurgent Spherical Full Face

£202.99 (RRP £349.99)

The Giro Insurgent Spherical is the helmet to look at if you want something more gravity-focused than a lightweight enduro full-face, but still more refined than an old-school downhill lid. It is designed for riders who want confidence on steep, rough descents, uplift days, bike-park laps and harder eMTB riding.

The key technology is Giro’s Spherical Technology powered by Mips. Instead of a standard liner arrangement, it uses a ball-and-socket design with separate impact layers intended to help redirect impact forces. For riders who care about helmet safety systems, that gives the Insurgent a clear point of difference.

It also has a Roc Loc Air DH fit system, which helps make it feel more secure and adjustable than many traditional gravity helmets. Ventilation is better than you might expect for a substantial full-face, with internal channeling and rear exhaust ports helping manage heat.

The Insurgent is not the first choice if you want the lightest possible pedalling helmet. The POC Otocon Race, Troy Lee Designs Stage, Smith Mainline and Fox Proframe RS all make more sense for long, climb-heavy rides. But if you want a full-face MTB helmet with a more protective, gravity-led feel, the Giro Insurgent Spherical is one of the strongest options in this price range.

Pros

Strong gravity-focused helmet with advanced protection design

Spherical Technology powered by Mips

Secure Roc Loc Air DH fit system

Good option for uplift, bike parks and harder eMTB descending

Cons

Heavier-feeling than more pedal-friendly enduro full-face helmets

Specifications

Type: Gravity full-face MTB helmet

Rotational protection:Spherical Technology powered by Mips

Shell: Dual-layer impact construction

Fit system: Roc Loc Air DH

Ventilation: Internal channeling with rear exhaust ports

Visor: Adjustable visor

Goggle compatibility: Yes

Giro Coalition Spherical

Giro Coalition Spherical

£184.99 (RRP £299.99)

The Giro Coalition Spherical is one of the most interesting full-face MTB helmets in this guide because it gives you a modern protection package in a relatively lightweight, pedal-friendly format. It is aimed at riders who want more than a basic trail full-face, but who do not necessarily want the heavier feel of a dedicated downhill helmet.

The key feature is Spherical Technology powered by Mips, Giro’s ball-and-socket style protection system. The Coalition also uses progressive layering with EPP and EPS foam, which is designed to manage different impact speeds. For riders comparing helmets on more than just price, that gives it a strong technical argument.

The Coalition sits in a useful place for UK riding. It is full-face protection with a clear trail and enduro bias, helped by big front intake ports, internal channeling and rear exhaust vents. That makes it more realistic for pedalled rides than many gravity-focused helmets, especially if you are riding stop-start trail-centre loops or technical woodland trails.

It is not the cheapest helmet in this guide, and the Giro fit will not suit every head shape. But if you want a high-spec enduro full-face MTB helmet with a strong safety story and good ventilation, the Coalition Spherical is a very strong modern option.

Pros

Strong protection package with Spherical Technology powered by Mips

Lightweight feel for a full-face helmet

Excellent ventilation focus for trail and enduro riding

Good choice for riders who pedal in a full-face regularly

Cons

Giro fit shape may not suit every rider

Specifications

Type: Enduro full-face MTB helmet

Rotational protection: Spherical Technology powered by Mips

Shell: Progressive Layering with EPP and EPS foam

Fit system: Padding-based full-face fit

Ventilation: Large intake and exhaust vents with internal channeling

Visor: Adjustable visor

Goggle compatibility: Yes

Leatt Gravity 4.0

Leatt Gravity 4.0

£188.99 (RRP £209.99)

The Leatt Gravity 4.0 is a strong option if you want a more protective-feeling full-face helmet without jumping to the most expensive gravity lids. It sits between budget full-face options and premium enduro helmets, making it a good choice for riders who want a helmet that feels ready for bike parks, harder trail riding and eMTB descending.

Leatt uses its 360° Turbine Technology across many of its helmets, and the Gravity 4.0 is designed around proper gravity use rather than gentle trail riding. It is ASTM DH-certified, which gives it a stronger descending brief than many lighter enduro lids. That makes it a sensible option if you want a helmet for rougher terrain, but still care about ventilation and comfort.

For UK riders, this is the sort of lid that makes sense if you split your time between trail centres and gravity days. It is more substantial than something like the Troy Lee Designs Stage, but not as expensive as some flagship helmets. It also suits eMTB riders who ride hard descents repeatedly and want something more confidence-inspiring than an open-face or very lightweight full-face.

The Gravity 4.0 is not the airiest helmet here, and riders doing long pedalled loops may prefer a more enduro-specific design. But as a strong-value gravity full-face with recognised protection technology, it is a very sensible middle-ground choice.

Pros

Strong gravity-focused protection at a sensible price

ASTM DH-certified design

360° Turbine Technology

Good fit for bike parks, uplift days and harder eMTB descending

Cons

Less climb-friendly than lighter enduro full-face helmets

Specifications

Type: Gravity full-face MTB helmet

Rotational protection: 360° Turbine Technology

Shell: Full-face polymer shell

Fit system: Traditional full-face fit with padding

Ventilation: 22 vents with removable mouthpiece cover

Visor: Breakaway-style peak

Goggle compatibility: Yes

Fox Proframe RS

Fox Proframe RS

£209.99 (RRP £329.99)

The Fox Proframe RS Mips is one of the most complete premium enduro full-face helmets for riders who expect to wear a full-face often. It takes the lightweight, breathable idea of the original Proframe and adds a more advanced safety and fit package, making it a strong choice for regular trail, enduro and eMTB riders.

The Proframe RS uses Mips Integra Split, combining dual-density foam with a low-friction layer intended to help manage impact forces. It also feels like a proper step up in refinement compared with simpler full-face helmets. Fit stability, sweat management, ventilation and goggle compatibility all matter more the longer you wear a helmet, and that is where premium enduro helmets justify themselves.

For UK riding, the Proframe RS is especially relevant if you do a lot of trail-centre laps, race enduro, ride rough natural descents or use an eMTB to rack up repeat runs. It is protective enough to feel reassuring, but still breathable enough to wear on pedalled rides.

It is more expensive than many helmets in this guide, but it also feels like a long-term tool rather than a “just in case” lid. If you know you want a full-face helmet for frequent use, the Fox Proframe RS is one of the best full-face MTB helmets to consider.

Pros

Premium enduro full-face helmet for frequent use

Mips Integra Split protection system

BOA fit system helps stability

Excellent choice for hard trail, enduro and eMTB riding

Cons

More expensive than many riders need for occasional use

Specifications

Type: Enduro full-face MTB helmet

Rotational protection: Mips Integra Split

Shell: Dual-density impact construction

Fit system: BOA fit system

Ventilation: Large enduro-focused vent layout

Visor: Three-position adjustable visor

Goggle compatibility: Yes

POC Otocon Race - 
best trail MTB helmets 2026

POC Otocon Race

£209.99 (RRP: £300)

The POC Otocon Race Mips is one of the best full-face MTB helmets for riders who want high-end enduro protection without a heavy downhill feel. It is exceptionally light and well ventilated for a full-face, which makes it a strong choice for riders who plan to pedal in it regularly.

This is exactly the type of helmet that makes sense for aggressive UK trail riding. If you ride steep trail-centre descents, rough natural lines, winter eMTB laps or enduro-style routes, the Otocon Race gives you full-face coverage without making every climb feel like a chore. The ventilation design is a major part of its appeal, helping keep air moving when you are working hard rather than sitting on an uplift.

POC has also packed in a strong safety and usability package. Mips protection, a Race Lock adjustment system, a breakaway peak, twICEme NFC medical ID and a RECCO reflector all give it a premium feel. For riders who use a full-face often, those details start to matter.

The Otocon Race is not cheap, and some riders may prefer the more familiar fit of Smith, Fox or Giro. But if you want one of the lightest, most breathable and most feature-rich enduro full-face helmets in this guide, the POC is a standout.

Pros

Very light and breathable for a full-face helmet

Strong premium safety feature package

Good option for aggressive trail and enduro riding

Comfortable enough for pedalled UK rides

Cons

Premium price and fit may not suit every head shape

Specifications

Type: Enduro full-face MTB helmet

Rotational protection: Mips

Shell: Lightweight full-face construction with dual-material liner

Fit system: Race Lock adjustment system

Ventilation: Highly ventilated enduro layout

Visor: Breakaway peak

Goggle compatibility: Yes

Which full-face MTB helmet should you buy?

If you want the cheapest route into a proper Mips-equipped full-face mountain bike helmet, the Bell Sanction 2 DLX Mips is the obvious starting point. It gives you full-face coverage, a recognised protection system and a sensible price. The Endura SingleTrack Full Face Mips is the better budget choice if you want something more trail-friendly and more realistic for pedalled rides.

If you ride bike parks, uplifts or rough gravity lines more often, look at the Fox Rampage Mips, Leatt Gravity 4.0 or Giro Insurgent Spherical. They feel more substantial and make more sense when pedalling comfort is not the main priority.

If you want a pedal-friendly full-face for normal UK trail riding, the Troy Lee Designs Stage, Smith Mainline, Giro Coalition, Fox Proframe RS and POC Otocon Race are the strongest options. The Stage is the proven enduro pick, the Mainline is the best Smith/goggle-friendly choice, the Coalition is the modern Giro option, the Proframe RS is the frequent-use enduro tool, and the Otocon Race is the premium breathable choice.

For eMTB riders, the best choice often depends on how many laps you do and how much climbing is involved. If you are pedalling all day, buy ventilation and comfort. If you are using the motor to repeat steep descents, do not under-buy on stability and protection.

Full-face, convertible or open-face helmet?

A dedicated full-face helmet is the right choice if you know you want facial coverage every time you ride certain trails. It is simpler, usually more secure-feeling and often more confidence-inspiring than a removable-chin-bar design.

A convertible helmet makes sense if your rides genuinely switch between open-face and full-face needs. For example, you might climb long bridleways in open-face mode, then attach the chin bar for steeper descents. The compromise is that convertible helmets can be bulkier, heavier or less refined than buying separate helmets. Read our best convertible MTB helmets 2026 guide if that sounds like the better route.

An open-face trail or enduro helmet is still the better option for many riders. If your riding is mostly bridleways, flowing blue trails, family routes or lower-speed off-road loops, a good open-face helmet may be cooler, lighter and easier to live with. Our best enduro MTB helmets 2026 guide covers higher-coverage open-face lids for riders who want more protection without a chin bar.

Frequently Asked Questions

What is the best full-face MTB helmet in 2026?

The best full-face MTB helmet in 2026 depends on how you ride. For pedal-friendly trail and enduro riding, the Fox Proframe RS, POC Otocon Race, Giro Coalition, Smith Mainline and Troy Lee Designs Stage are strong choices. For bike parks and gravity riding, the Giro Insurgent, Fox Rampage and Leatt Gravity 4.0 make more sense.

Are full-face MTB helmets worth it for trail centres?

Yes, full-face MTB helmets are worth considering for trail centres if you ride steeper descents, faster red and black routes, or technical features where facial coverage feels sensible. A lightweight enduro full-face can be a good compromise because it gives more protection than an open-face helmet without feeling like a heavy downhill lid.

Do eMTB riders need a full-face helmet?

Not always, but many eMTB riders benefit from one. An eMTB can mean more climbs, more laps and more descending in a single ride, which increases the amount of time spent on rough or fast terrain. You do not need an eMTB-specific helmet, but a breathable full-face MTB helmet can be a sensible upgrade for harder riding.

What is the difference between an enduro full-face helmet and a downhill helmet?

An enduro full-face helmet is usually lighter, better ventilated and more comfortable for pedalled riding. A downhill helmet normally feels more substantial and is aimed at bike parks, uplifts, racing and gravity riding where climbing comfort matters less. The right choice depends on whether you pedal in the helmet or mainly wear it for descents.

Can you pedal in a full-face MTB helmet?

Yes, but some full-face helmets are much better for pedalling than others. Helmets such as the Troy Lee Designs Stage, Smith Mainline, Giro Coalition, POC Otocon Race and Fox Proframe RS are designed with ventilation and all-day wear in mind. Heavier gravity helmets are better saved for uplift days and short climbs.

How should a full-face MTB helmet fit?

A full-face MTB helmet should feel snug all around without painful pressure points. It should sit level on your head, protect the forehead properly and not move when you shake your head. Cheek pads should make light contact, but should not cause discomfort. If you are between sizes, try both rather than guessing.

Are Mips full-face helmets worth it?

Mips and similar rotational impact systems are worth considering because many crashes involve angled impacts. They are not the only safety factor, and fit still matters most, but if two helmets both fit well, choosing the one with a recognised rotational protection system is sensible.

Should I buy a full-face or convertible MTB helmet?

Buy a dedicated full-face if you know you want facial coverage for the rides you do. Buy a convertible helmet if you genuinely need open-face comfort for long climbs and a chin bar for descents. If the removable chin bar feels like something you would rarely use, a dedicated full-face or a high-coverage open-face helmet may be a better choice.

What is the best budget full-face MTB helmet?

The Bell Sanction 2 DLX Mips is the cheapest strong option here if you want a Mips-equipped full-face helmet, while the Endura SingleTrack Full Face Mips is the better budget trail choice if you want more ventilation and a more ride-friendly fit system. The Fox Rampage Mips is the better budget gravity option if bike parks and uplift days are the priority.

What should I look for in a full-face MTB helmet?

Fit comes first. After that, look at ventilation, weight, goggle compatibility, cheek pad comfort, visor design, rotational protection, safety certification and whether the helmet suits your riding style. A hot, uncomfortable helmet is less useful because you will avoid wearing it.