A steep descent puts your chin, teeth, and jaw in the line of impact, and a full-face shell spreads that risk across a larger surface. Mips, short for Multi-directional Impact Protection System, is a slip-plane layer inside the helmet that can reduce rotational forces in certain impacts.
Measure your head circumference before ordering, since sizing ranges differ sharply across brands. Weight, vent count, and chin-bar design then decide whether a helmet suits park laps, enduro climbs, or downhill runs.
The Lineup, Simplified
Troy Lee Designs Stage Helmet Stealth Midnight MD/LG
OutdoorMaster MIPS Full Face MTB Helmet 54-62cm
Bell Super Dh MIPS Spherical Helmet Fasthouse Medium
Fly Racing Rayce MTB/BMX Bicycle Helmet Matte Grey Large
Giro Insurgent Spherical Helmet M-L 55-59CM
Bell Sanction 2 DLX MIPS Bike Helmet Teal X-Small/Small
Fox Racing Proframe Mountain Bike Helmet Berry Medium
Meet The Standout Selections
Long climbs in a full-face helmet punish the neck, and this Stage build gives you a notably lighter carry at roughly 690g. That matters on enduro days where pedalling up matters as much as descending. The shell pairs Mips with two foam densities, EPP for lower-speed impacts and EPS for higher-speed impacts, so energy management is layered rather than single-density.
Ventilation runs through 25 intake and exhaust ports, a count that suits warm-weather riding better than a minimal-vent downhill shell. A polyacrylite-injected chin bar with EXO-Skeleton reinforcement adds structure without a large weight penalty. Break-away visor screws are a small detail that can matter in a crash, since the visor can detach rather than lever against the shell.
Points In Its Favor
- 690g class weight reduces neck fatigue on long rides
- Dual EPP and EPS layers address different impact speeds
- 25 ports support airflow during climbs and descents
- Reinforced chin bar balances strength and weight
- Break-away visor screws reduce visor leverage in impacts
Things To Consider
- MD/LG sizing narrows fit options for smaller heads
- Lightweight construction trades some bulk for rider comfort
Compared with the Stage helmet, this OutdoorMaster shell trades some weight savings for a wider stated fit range, and that range makes sizing simpler for you. The listed span covers 54 to 62cm, so riders near either end have a clearer starting point. A PC shell with EPP foam and chin-bar shock pads forms the core construction.
Ventilation is the headline here, with 27 vents and a weight just under 750g. A removable, washable liner helps after muddy park days, while two D-ring thicknesses give strap options for different cheek-pad setups. A goggle-strap channel and pivoting visor suit downhill and BMX use, where eyewear stays on through most runs.
The Helpful Details
- 27 vents promote airflow in warm riding conditions
- Washable liner simplifies cleanup after muddy rides
- Two D-ring thicknesses allow strap adjustment
- Goggle channel keeps eyewear positioned on descents
Worth Noting
- Just under 750g is heavier than the 690g Stage helmet
- Single broad size range may need careful pad setup
- Goggle channel matters most for downhill-focused riding
Who It Suits Best
Downhill and BMX riders wanting strong ventilation and a broad size range.
Where Another Pick Suits Better
Troy Lee Designs Stage Helmet suits riders prioritising lower weight for long enduro climbs.
Trail riders who want one helmet for mixed terrain get a different proposition here, and the removable chin bar gives you that flexibility. The bar comes off without tools for lighter trail use, then returns for gravity riding. Flex Spherical + Mips combines a spherical slip-plane with foam layering for rotational, low-speed, and high-speed impacts.
Fit hardware is unusually detailed, with a Float Fit DH dial using a Fidlock buckle and X-Static XT2 padding that dries quickly. Overbrow ventilation feeds 19 helmet vents, 2 brow ports, and 4 chin-bar vents. An adjustable visor works with goggles or glasses, and an integrated break-away camera mount avoids tape or zip ties.
The Value In It
- Removable chin bar adapts between trail and downhill use
- Float Fit dial allows fine fit adjustment
- Overbrow ports channel air across the brow
Trade Offs
- Removable chin bar requires careful refitting before gravity riding
- Three size bands demand an accurate head measurement
Bike-park laps and downhill runs reward a helmet that feels balanced at speed, and this Rayce shell gives you that steady gravity focus. A poly-alloy shell with EPS liner meets ASTM F1952-15 for downhill, CPSC 1203, and CE EN1078 standards. That standards list is a clear signal for riders who check compliance before anything else.
At roughly 930g in size M, weight sits above the Stage and OutdoorMaster options, so long climbs will feel heavier. True Functional Ventilation uses multiple intake and exhaust ports for heat management on warm days. A removable, washable liner with cheek pads and a D-ring strap keep the setup familiar, while an adjustable visor with aluminium hardware positions quickly.
What Helps Most
- Multiple downhill and cycling standards listed
- Washable liner with cheek pads aids upkeep
- D-ring strap gives a secure, familiar closure
- Adjustable visor suits different riding styles
- TFV ports support airflow in warm conditions
Minor Gripes
- 930g weight is notably heavier than lighter picks here
Emergency removal is rarely discussed until it matters, and this Insurgent Spherical design gives you a directional snap system built for that moment. The system aims to hold securely during riding while allowing easier removal in an emergency. Spherical technology pairs with a patent-pending Flex Gasket using exposed EPP to address certain collarbone impacts.
At 1040g, this is the heaviest shell in the group, so the trade-off shows up on long pedalling days. Airflow comes from intake vents, internal channeling, and exhaust ports, with lightweight Ionic+ padding that absorbs moisture. Breakaway visor bolts work without tools, and a dual-duty mount supports camera use. Standards include ASTM F1952-00, ASTM F2032, CPSC, and CE EN 1078.
Real-World Strengths
- Directional snap supports emergency removal
- Flex Gasket with EPP addresses collarbone impacts
- Channelled airflow helps warm-weather riding
- Breakaway visor bolts simplify visor handling
Room For Improvement
- 1040g weight suits gravity use more than long climbs
- M-L size band covers 55-59cm only
Park riding and casual trail sessions often call for a simpler full-face setup, and this Sanction 2 DLX gives you exactly that straightforward approach. Mips sits inside the shell to help reduce rotational forces in some impacts. Fourteen vents keep airflow central to the design, which suits riders who overheat quickly in a closed shell.
A Fidlock magnetic buckle slides closed laterally for one-handed release, a small convenience that helps at trailheads. Quick-drying padding uses Ionic+ yarn for odour control, and the visor design removes the traditional centre post to add energy-management material in a high-impact zone. ASTM downhill and BMX standards are listed alongside the Mips system.
What Earns Its Place
- Magnetic buckle allows quick one-handed release
- 14 vents prioritise airflow for park riding
- Quick-drying liner helps manage sweat
Points To Note
- X-Small/Small sizing suits smaller head circumferences
Made For
Newer riders and park-focused cyclists wanting a simpler, ventilated full-face design.
Consider Something Else When
Bell Super Dh MIPS Spherical suits riders wanting a removable chin bar for mixed trail use.
Aggressive trail riding places a premium on fit tuning, and this Proframe helmet gives you an extra pad set to dial in the interior. That inclusion matters because a full-face shell with a loose fit loses much of its purpose. Mips protection is listed for this model, alongside ASTM-F1952 downhill MTB standards and NTA-8776 for e-bike use.
Ventilation and reduced surface contact aim to improve cooling on climbs, which separates this approach from the heavier gravity shells above. A three-position adjustable visor works with goggles, and a removable under-visor GoPro mount keeps camera placement clean. The Berry colourway in Medium is the variant listed here, so colour preference becomes part of the decision.
Everyday Wins
- Extra pad set helps optimise interior fit
- Three-position visor adapts to goggle use
- Removable GoPro mount keeps camera setup tidy
- Reduced contact area supports cooling
- Downhill and e-bike standards listed
Softer Spots
- Medium sizing limits options for other head sizes
- Fit tuning depends on using the included pads correctly
- Camera mount placement needs checking before riding
What Matters Most Before Choosing Mips Full Face Mountain Bike Helmet
Fit and Head Measurement
Measure circumference at the widest point and compare it with the stated range for each shell. Check pad thickness and strap adjustment before committing, since a loose fit undermines coverage. Match the size band to your measurement rather than to a general size label.
Weight for Your Riding Style
Long enduro climbs reward a lighter shell, while shuttle-served downhill days tolerate extra weight. Compare listed weights across the picks, noting that the Stage sits near 690g and the Insurgent near 1040g. That spread changes neck fatigue over a full day.
Ventilation and Eyewear
Warm climates and slow climbs call for higher vent counts and brow ports. Goggle users should confirm strap channels and visor clearance before riding. Glasses users need a visor that works without goggles, as on the Bell Super Dh design.
Key Considerations Across These Picks
Common Shopping Slip Ups
Ordering by size label alone causes most fit problems, so measure first and check the range. Ignoring vent design leads to overheating on climbs, and skipping eyewear checks creates goggle conflicts. Confirm chin-bar needs before choosing a convertible model.
What The Higher Tier Buys
Higher-tier shells often add layered foam densities, emergency release systems, and dial-fit hardware. Those features suit riders logging long days or riding steep terrain. Simpler park helmets remain sensible when sessions stay short and speeds stay moderate.
Frequently Asked Questions
What does Mips do inside a helmet?
Mips is a slip-plane layer that can reduce rotational forces in certain impacts. It works alongside foam liners rather than replacing them.
How should a full-face helmet fit?
Measure your circumference and compare it with the listed range for each model. Check strap adjustment and pad fit before riding.
Are removable chin bars safe for downhill riding?
Removable chin bars suit trail use when refitted correctly for gravity riding. Follow the maker instructions for attachment before each use.
Which weight suits long enduro rides?
Lighter shells near 690g reduce neck fatigue during climbs and descents. Heavier gravity shells suit shuttle and park days better.
Can goggles work with these helmets?
Several models include goggle channels or adjustable visors for eyewear use. Check visor position and strap routing for your goggles before riding.
Final Thoughts
Match weight to riding style, measure before ordering, and confirm eyewear compatibility with your setup. The Stage suits long enduro days, while the Sanction 2 DLX suits shorter park sessions. Pick the shell that fits your head and your terrain, then ride with confidence in that choice.