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Fox Clothing Proframe Full Face MTB Helmet

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Product Description

Stealth protection for wide open riding across the whole mountain. The Fox Proframe is a full-face MTB helmet that combines DH protection with XC breathability and is ideal for enduro racing as well as aggressive trail riding.

Weighing just 750 grams (size medium) with 24 Big Bore vents, the Proframe is the lightest, most breathable DH certified full-face helmet that Fox have ever made and is packed full of cutting edge features. The Varizorb dual density EPS liner improves protection by spreading impacts over a wider area while the integral chin bar is firmly attached to the main helmet structure and meets ASTM downhill mountain bike helmet standards. With MIPS the Proframe offers improved protection from the rotational forces of real world impacts.

The 15 intake and 9 exhaust offer great air flow to keep you cool while the open chin bar design means that you can breathe easily even while climbing. The Fidlock SNAP helmet buckle offers maximum security when locked yet is very easy to undo when you need to, even with gloves on.

Get DH protection everywhere you ride with the Fox Clothing Proframe.

Key Features:

  • Lightweight DH approved full frame helmet at 750 grams for a size medium
  • Fox Integrated chinbar is secured to the main helmet structure for DH certification
  • Highly breathable liner system is moisture wicking and has anti-microbial properties
  • 24 Big Bore vents so you can stay cool and breathe easy
  • Fixed visor is positioned perfectly to ram maximum airflow into the Big Bore vents
  • Fidlock SNAP helmet buckle offers quick entry and exit with maximum security
  • Proven MIPS multiple impact protection system reduces rotation forces in a crash
  • Dual density Varizorb EPS liner offers improved protection
  • Sizes: Small, Medium, Large, X Large
  • Colours: Matt Black

MIPS Equipped

Reduces rotational violence to the brain on angled impacts.

Integrated Chin Bar

Meets ASTM DH standard.

Dual Density Eps

Spreads the force of impacts across a wider area.

Big Bore Airflow

15 intake and 9 exhaust vents for unrivaled breathability.

Ride Wide Open

The Fox Proframe Helmet is the lightest and most breathable full face helmet we have ever created. Designed to perform at the highest levels for aggressive all mountain riders and enduro racers, it packs DH certified protection into a superlight shell via our patent pending, fully integrated chinbar. With 15 Big Bore intake and 9 exhaust vents, the Proframe Helmet offers open face level airflow and breathability to keep you cool on even the longest and most challenging climbs; and once you reach the top, it gives you the confidence to ride to your limits on even the toughest of descents.

This helmet is equipped with the MIPS low friction layer. MIPS is a patented brain protection system developed to reduce rotational violence causing strain in the brain at angled impacts. MIPS mimics the brain’s own protection system by adding a low-friction layer between the head and the helmet. A helmet with MIPS can absorb more energy from an angled impact. Conventional helmets are tested by dropping them vertically onto a flat surface. MIPS is designed and tested for reality, reflecting how most accidents occur, with angled impacts to the head. MIPS raises the bar for helmet safety.


  • ASTM F1952 (including chin bar rigidity test)
  • EN 1078
  • AS/NZ 2063
  • CPSC


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    Fox Clothing Helmets Sizing

    Fox Clothing

    Fox Clothing Helmets Size Chart

    Use the Fox Clothing size chart to find the best fit for you.

    Ranger Helmet | Striker & Ranger Sizing




    50cm - 55cm

    55cm - 59cm

    59cm - 64cm

    19.68" - 21.65"

    21.65" - 23.25"

    23.25" - 25.25"

    Rampage Pro Carbon / Rampage Comp / Rampage Sizing







    53cm - 54cm

    55cm - 56cm

    57cm - 58cm

    59cm - 60cm

    61cm - 62cm

    63cm - 64cm

    20.875" - 21.25"

    21.67" - 22.125"

    22.375" - 23.125"

    23.25" - 23.75"

    23.875" - 24.75"

    24.8" - 25.25"

    Flight / Flight Sport Sizing




    53cm - 54cm

    55cm - 56cm

    57cm - 58cm

    20.875" - 21.25"

    21.675" - 22"

    22.5" - 22.875"

    Proframe Sizing





    52cm - 56cm

    56cm - 58cm

    58cm - 61cm

    61cm - 64cm

    20.5" - 22"

    22" - 23.125"

    23.125" - 23.875"

    23.875" - 25.25"

    Metah Sizing




    52cm - 56cm

    56cm - 59cm

    59cm - 64cm

    20.5" - 22"

    22" - 23.25"

    23.25" - 25.25"

    Read our clothing size guide for more information on sizing.

    Please note, all size information is provided as a guide - if you're unsure or need any further assistance you can call us on 01792 799508 ... we're happy to help!

    Full Face Helmet Guide


    Full Face Helmet Guide

    Full Face Helmets

    Full face helmets are designed for gravity mountain biking and BMX racing. With a chin bar and a thicker core than open face MTB helmets, full face lids are designed for high speed riding on challenging terrain. When it comes to protection, all our MTB helmets meet the minimum safety standard (CE EN 1078). Most full face helmets go much further than this with thicker cores and more durable shells as well as enhanced safety features like dual density cores and MIPS. Some full face helmets are designed to meet the international ASTM DH standards.

    Full face helmets can be roughly split into two types; downhill or DH helmets and enduro helmets. Downhill helmets look similar to off-road motorbike helmets, with lots of internal padding and very few vents. Enduro helmets have a lot more venting and look like regular MTB helmets with an added chin guard, which is sometimes removable. The chin guard on enduro helmets is especially well vented to make breathing easier on climbs and traverses. This isn’t a definitive definition as many enduro racers wear DH helmets, while enduro helmets are becoming more popular with trail riders.

    Features to look out for in a full face helmet:



    The shell is the outer covering of a full face helmet. As well as the standard polycarbonate shell found on regular mountain bike helmets, full face lids sometimes features a fibreglass or carbon shell. The shell is moulded to the core and completely covers the helmet including the chin piece. The very best full face helmets have a carbon fibre composite shell that is lightweight as well as offering the best protection.

    Full face helmet and google rest on the bars of a Cube Stereo


    Sitting directly under the shell is the Core. Like most cycling helmets the core is usually made from EPS foam. Sometime on high end DH lids EPP foam is used as this offers better multi impact protection. Multi density foam cores are sometimes used for improved impact protection at various speeds. While the shell of DH helmets strengthens the core, Enduro style full face helmets sometimes feature additional strengthening elements to compensate for all the extra venting that break up the integrity of the shell.

    Full face helmets usually feature an EPS foam core. Some offer EPP / multi-density foam cores for improved multi-impact protection.


    A Multi-directional Impact Protection System (MIPS) is fitted between the helmet core and your head. This slip-plane technology reduces the rotational forces that result from certain impacts. Integrated into the fit system, MIPS is found on high-end MTB helmets and takes head protection to the next level. Some brands offer different slip plane technologies, like SPIN, that do the same thing as MIPS.

    Fit & Straps

    Full face helmets have two different fitting systems. Downhill helmets have similar fitting to motorbike helmets. Here the liner is extensive. It extends all the way around your head, with cheek pieces in the chin guard, so it grips your head effectively without the need for an adjustable fit system. Enduro style full face lids don’t tend to have so much padding, and may use an adjustable fit system like regular cycling helmets. This is sometimes supplemented with cheek pads for a firmer fit. Chin straps are there to keep your helmet in place even if you take a knock on the head. Again, there are two ways to do this; DH lids use a more secure D-ring style strap similar to those found on motorbike helmets, while enduro lids use a snap fit buckle.

    Downhill rider fastening their chin strap


    The padded liner is the bit of the helmet that connects directly to your head. If you ride a lot, then features to look out for are removable, washable pads made from quick drying, hydrophilic and anti-microbial materials. These will help keep your head smelling sweetly on every ride.

    Many full face helmets feature a removable liner for easier cleaning


    Venting helps to keep your head cool while you ride by allowing air to move over your head as you ride. The venting on downhill helmets is minimal as you will be moving relatively fast when you ride which greatly improves airflow. Enduro style full face helmets have much more extensive venting as these are designed for climbing as well as descending. The rule of thumb for cycling helmets is that more and/or larger vents will increase the amount of airflow over your head. Vent position matters too. Vents close to the brow offer cooling where you need it most while vents in the chin guard are designed to aid breathing. Internal airflow channelling draws air in and circulates it around your head for more efficient cooling.

    Chris Kovarik wearing a well ventilated Fox helmet

    Removable chin guards

    Enduro style full face helmets sometimes have removable chin guards. This means that you can take the chin piece off for extra cooling and easier breathing when climbing. Removable chin guards may not offer as much protection as a fixed one, although some full face helmets with removeable chin pieces are ASTM DH certified.

    Enduro riders wearing helmets with removable chin guards


    All full face mountain bike helmets have a visor to help keep the sun or rain out of your eyes. Most full face lids have an adjustable visor so you can push it out of the way for maximum visibility when you don’t need it.

    A full face helmet with an adjustable visor

    Goggle Compatibility

    Full face mountain bike helmets are all designed to work with goggles. However, as goggles are different shapes some will work better with a particular helmet than others. Some full face lids are designed to be compatible with specific brands or types of goggles but will usually work with others too.

    Some brands of helmet and google work together better than others. This rider pairs Oakley goggles with a Fox helmet.

    Action camera mounts

    With a dedicated action camera mount, you can attach your GoPro securely to your helmet. Break-away mounts are the safest way to attach your action camera.

    Mountain biker with GoPro mounted to a full-face helmet


    It is important to get a helmet that fits correctly. Simply measure the circumference of your head and match it to the helmet size. Do this by placing a tape measure on the centre of your forehead and wrap it around your head above the ears. See our clothing size guide for more details.

    Helmet sizing


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