7 Best Open Face Mountain Bike Helmets for Trail Riding (2026)
Compare 7 open face mountain bike helmets by fit, ventilation, coverage and use case. Find the right trail or enduro lid with our buyer's guide.
By bikehelmetsnow editorial team
Updated November 6, 2026
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Shopping for an open face mountain bike helmet means balancing two things: the wide ventilation and open chin area that make long climbs comfortable, and the coverage that protects your face and jaw on steep, technical descents. This guide ranks seven options by how well they fit different riding styles, using manufacturer specifications, brand reputation and the patterns owners tend to report. Selection criteria include certification to CPSC or CPSC-equivalent and EN 1078 standards, fit adjustability, weight, ventilation design, visor and goggle compatibility, and chin bar construction. Because we have not personally tested these helmets, each pick reflects published specs and general owner feedback rather than hands-on lab work.
Our Top Picks
Quick Comparison
| Product | Best for | Key feature |
|---|---|---|
| Giro Montaro MIPS | All-round trail riding | MIPS rotational protection with an open face design |
| Bell Super DH Spherical | Downhill and bike park | Spherical multi-impact shell with a lightweight-leaning build for its class |
| Troy Lee Designs A2 Half Shell | Enduro and aggressive trail | Adjustable fit with a wide range of goggle and visor compatibility |
| Specialized Ambush Comp | Trail riders on a budget | Value-oriented build with the same open face layout |
| Fox Racing Dropframe Pro | Fit-focused riders | Adjustable fit system and generous ventilation |
| POC Kortal Race MIPS | Race-oriented XC and trail | Lightweight profile with MIPS protection |
| Smith Session MIPS | Riders who wear goggles or sunglasses | Wide opening and a visor that reduces glare |
Giro Montaro MIPS
This is a strong general-purpose choice for riders who spend most of their time on trails that mix climbing and moderate descending. Its open face and ventilation suit warm climates, and the MIPS liner adds rotational impact management that many riders prefer for mixed terrain.
Key specs
- Shell: in-mold construction with MIPS liner
- Certification: CPSC and EN 1078 (per manufacturer)
- Fit: dial-adjusted retention system
- Visor: removable, adjustable
Pros
- Good balance of ventilation and coverage
- MIPS adds rotational protection
- Adjustable fit suits a range of head shapes
Cons
- Less coverage than a full-face option for very steep descents
- Heavier than minimalist XC lids
Bell Super DH Spherical
Riders who spend time in bike parks or on fast downhill runs often look at this model because of its broader protection profile. It remains an open face design, but its shape and padding are built around higher-speed impacts than most trail lids handle.
Key specs
- Shell: multi-impact spherical design
- Certification: CPSC and EN 1078 (per manufacturer)
- Fit: adjustable retention system
- Chin bar: open face with reinforced chin area
Pros
- Strong impact-management design for downhill speeds
- Good fit adjustment for secure retention
- Well-established brand with broad sizing
Cons
- Warmer and heavier than trail-focused options
- Overkill for casual or climbing-heavy riding
Troy Lee Designs A2 Half Shell
Enduro racers and aggressive trail riders frequently consider this helmet for its adjustability and goggle compatibility. The fit system is widely praised in owner discussions for accommodating different head shapes without awkward pressure points.
Key specs
- Shell: half-shell design with fiber-reinforced construction
- Certification: CPSC and EN 1078 (per manufacturer)
- Fit: adjustable retention system
- Visor: adjustable and removable
Pros
- Adjustable fit for a secure, custom feel
- Good compatibility with goggles and visors
- Solid ventilation for a half-shell design
Cons
- Sizing can run snug for some head shapes
- Fewer color options than some competitors
Specialized Ambush Comp
This is a practical pick for trail riders who want an open face helmet with a familiar brand name and a value-oriented build. It suits riders who ride a few days a week and do not need race-level specs.
Key specs
- Shell: in-mold construction
- Certification: CPSC and EN 1078 (per manufacturer)
- Fit: adjustable retention system
- Visor: removable
Pros
- Budget-friendly option from a major brand
- Comfortable ventilation for climbing
- Simple adjustment system
Cons
- Fewer advanced features than premium models
- Less refined padding in some owner reports
Fox Racing Dropframe Pro
Riders who have struggled with helmet fit in the past often look at this model because of its adjustable retention system and ventilation layout. It fits a broad mix of trail and enduro use.
Key specs
- Shell: in-mold construction
- Certification: CPSC and EN 1078 (per manufacturer)
- Fit: adjustable retention system
- Ventilation: multiple vents across the shell
Pros
- Adjustable fit for a secure feel
- Good airflow for warm-weather riding
- Well-known brand with consistent sizing
Cons
- Heavier than minimalist trail helmets
- Limited color choice in some markets
POC Kortal Race MIPS
Cross-country and race-oriented riders often choose this helmet for its lighter profile and low-profile fit. It is designed for efficient climbing and fast, controlled trail riding rather than downhill speeds.
Key specs
- Shell: lightweight in-mold construction with MIPS
- Certification: CPSC and EN 1078 (per manufacturer)
- Fit: adjustable retention system
- Ventilation: high-airflow vent layout
Pros
- Lightweight for its protection class
- MIPS rotational protection included
- Good airflow for hard efforts
Cons
- Less coverage than enduro or downhill helmets
- Race-oriented fit may feel snug to casual riders
Smith Session MIPS
This helmet is often recommended for riders who wear goggles or sunglasses on the trail. Its wide opening and visor design help manage glare and keep eyewear seated comfortably.
Key specs
- Shell: in-mold construction with MIPS
- Certification: CPSC and EN 1078 (per manufacturer)
- Fit: adjustable retention system
- Visor: adjustable
Pros
- Wide opening suits goggle wearers
- MIPS adds rotational protection
- Adjustable visor for glare control
Cons
- Can feel bulky for riders who prefer a minimal look
- Sizing requires careful measurement
Buying Guide
Selection Criteria
Start with the kind of riding you do most. Cross-country and light trail riding favor lightweight, highly ventilated lids. Enduro and downhill riding favor more coverage, a stronger chin bar and a secure fit at speed. Commuters and casual riders often want a balance of comfort and affordability.
Important Features
- Standards: Look for CPSC certification (required for sale in the US) and, for many riders, EN 1078 as well. Manufacturers list these on the packaging or product page.
- MIPS or similar rotational systems: These liners are designed to reduce rotational forces in certain impacts. They are an added feature, not a replacement for certified protection.
- Retention system: A dial or ratchet system makes fine adjustments easier than straps alone.
- Ventilation: Count the vents and check whether they line up with the crown and forehead.
- Visor and goggle fit: Confirm the visor is removable or adjustable if you use goggles.
Specs to Check
- Head circumference measured about 1 inch above the eyebrows, in the same position the helmet will sit
- Helmet weight, listed in grams or ounces
- Coverage: open face versus half shell versus full face (open face means no chin bar)
- Replacement policy and the manufacturer’s recommended replacement interval after a crash or after several years of use
Choosing by Need
- Climbing-heavy trail riding: Prioritize weight and airflow.
- Enduro or aggressive trail: Prioritize fit security and goggle compatibility.
- Bike park or downhill: Prioritize impact design and coverage, and consider whether an open face model is the right choice at all.
- Riders who wear eyewear: Prioritize wide openings and visor adjustment.
Things to Watch Out For
- Do not buy a helmet by size label alone. Fit varies by brand.
- Replace any helmet after a crash, even if no damage is visible. Consult the manufacturer’s guidance.
- Open face helmets leave the chin and jaw exposed. Riders who descend fast or ride technical terrain should weigh that tradeoff carefully. A qualified bike fitter or coach can help you decide.
FAQ
What is an open face mountain bike helmet?
It is a helmet with no chin bar, leaving the lower face open. Most open face models are sold for trail, cross-country and general mountain biking.
Are open face mountain bike helmets safe?
Certified open face helmets meet recognized standards for the head and brain. They offer less facial and jaw coverage than full-face helmets, so the level of risk depends on the terrain and speed you ride. A qualified professional can help you assess your needs.
What certifications should I look for?
CPSC certification is the US baseline for bike helmets. EN 1078 is a common European standard that many manufacturers also meet. Check the product label or manufacturer page.
How should an open face helmet fit?
It should sit level on the head, cover the forehead, and stay in place when you shake your head. The side straps should form a V under the ears, and the chin strap should allow one or two fingers under it.
How often should I replace my helmet?
Replace it after any crash, and follow the manufacturer’s guidance on age. Many brands recommend replacement after a set number of years because materials degrade over time.
Do MIPS helmets cost more to protect me?
MIPS is an added rotational-impact liner. It can be a useful feature, but it does not replace certified protection. Compare the full spec sheet rather than focusing on one feature.
Can I wear goggles with an open face helmet?
Yes, most open face models are designed to work with goggles. Check that the helmet’s visor and opening give enough room for your eyewear.
Conclusion
For all-round trail riding, the Giro Montaro MIPS and Specialized Ambush Comp are practical starting points. Enduro riders may prefer the Troy Lee Designs A2 Half Shell or Fox Racing Dropframe Pro for their fit systems. The Bell Super DH Spherical suits bike park and downhill riding, while the POC Kortal Race MIPS fits race-oriented riders. The Smith Session MIPS is worth a look if you wear goggles often. Whatever you choose, confirm the certification, measure your head carefully, and replace the helmet after any crash.
About the author
bikehelmetsnow editorial team writes reviews and buying guides for Bike Helmet Snow.