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Klim F4 Helmet - Solid
  • Klim F4 Helmet - Solid - Matte Black
  • Klim F4 Helmet - Solid - Matte Black

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In an effort to make one of the most comfortable motorsport helmets on the market even better, Klim has been collecting racer, customer and dealer feedback for improvements on the F4 helmet since it’s introduction.

This is the Snell M2010 Rated helmet - ECE Rated helmet also available.

This newest version has implemented these improvements and the result is a helmet that is even more comfortable and better-fitting than the original F4. Intake and exhaust ports have been significantly enlarged allowing more air to enter and exit the helmet. The EPS liner shape has been modified in three ways. The cranial shape at the top of the helmet has been altered to allow a better fit on a wider variety of head shapes and also helps keep the helmet positioned correctly. The three large air channels that run laterally through the helmet were already some of the deepest offered in any helmet, but we have made them deeper in this version, allowing even more air to pass over the head and out of the helmet. The plenum chamber (inside the EPS) has also had its channels deepened, allowing an overall greater bandwidth of air to pass through the EPS to the rider’s head. 

The comfort liner has been completely redesigned to implement the latest technologies in moisture-wicking fabrics. Moisture-wicking foam has strategically-placed perforations allowing a much greater amount of air to pass through the liner while enhancing comfort. With an unprecedented 41 air-craving intakes, the F4 again establishes the newest standard in helmet ventilation technology. The helmet design is optimized to effectively channel air into the helmet where it is assisted by a network of air-channels in the the EPS liner to maximize airflow over the entire head. The result is a dramatically cooler and drier riding experience. The pocketable WINDSTOPPER® liner can be snapped onto the comfort liner in colder weather, which will still allow moisture to be moved away from the head while preventing air from directly contacting the head.

Safety standards have been exceeded not only through the use of aerospace materials, but also in the design. The F4 exceeds Snell M2010 and U.S. DOT standards.

Third Generation F4 Upgrades Include:

  • Improved fit
  • Improved ventilation via deeper air channels in the EPS
  • Improved ventilation via larger intake and exit ports
  • Improved fit of comfort liner
  • Improved comfort liner ventilation via airflow perforations
  • Improved moisture-wicking comfort liner via enhanced moisture-wicking fabrics and perforated foam
  • Bold new graphics and colors


  • Ram air induction technology with 41 air-craving intakes, the F4 sets the newest standard in helmet ventilation technology
  • Non-intrusive eye port increases field of vision
  • Ram air-induction scoops not only mine air as it flows over the helmet, but helps to increase the structural integrity of the helmet
  • Pressure chamber network in eps helps to maximize airflow over the head
  • Zonal fiber select construction with aerospace fiberglass, carbon fiber and Kevlar™ ensure a safer helmet
  • Removable cheek pads
  • Removable comfort liner
  • Exceeds snell M2010 and DOT standards
  • Moisture-wicking foam liner and liner material

Included with Helmet:

  • Cold weather liner with Gore Windstopper® technology
  • Included Windstopper® liner is small and pocketable, snaps onto foam comfort liner
  • Breath deflector
  • Deluxe nylon carrying bag
  • Spare visor and visor bolt
  • Fleece-lined comfort collar and beard flap
Write a Product Review for a chance to win our monthly $100 giveaways.
Klim F4 Helmet - Solid 4.8 5 4 4
Solid helmet, pricey but worth it. This is a great helmet. With the insertable cushions, it's a good fit. The Snell version is a little heavy, but totally wearable. I live a hot, dusty place, so I've appreciated the airflow through the helmet. It keeps me cool. Great work, Klim! July 22, 2014
Awesome helmet This helmet is everything advertised! Great style, incredible airflow and a good fit. What a value for this helmet and extras included! It does fit a bit large. My XL was a bit sloppy so I contacted Klim who offered to send two additional cheek pad thicknesses free of charge! Wow, great customer service backs this quality helmet. January 6, 2014
Epic Lid If you a hot sweaty mess, you're quest is over son. This thing flows more air than any helmet I've ever seen. Fit is intermediate oval. Attention to detail is outstanding. Comes with a nice helmet bag, spare visor, and essential wind stopper and breath guard for the cooler riding weather. I've ridden in the low 60's and you definitely are thankful for the wind stopper liner. October 22, 2013
Tons of Air Flow Top Quality from front to back. Not sure if I have seen anything with a better fit and finish. You definitely get what you pay for. Tons of air flow, Keep the cold weather liner as you will need it when it gets cooler. June 18, 2012
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We highly recommend finding a cloth tape measure and taking the time to take these measurements.  Klim sizes will not necessarily correlate with fitment in other brands.

Klim Helmet Sizing

Hat Size 6 5/8" - 6 3/4" 6 15/16" - 7 3/16" 7 1/4" - 7 3/8" 7 1/2" - 7 5/8" 7 3/4" 7 7/8" 8 3/8"
Head Circumference (In) 20 1/2" - 20 7/8" 21 1/4" - 21 11/16" 22 1/16" - 22 7/16" 22 13/16" - 23 1/4" 23 5/8" - 24" 24 7/16" - 24 13/16" 25 3/16" - 25 5/8"
Head Circumference (Cm) 52 - 53 54 - 55 56 - 57 58 - 59 60 - 61 62- 63 64 - 65

Sizing information is provided by the manufacturer and does not guarantee a perfect fit.

Click here to see the full Klim Size Chart
Product Style RevZilla Item # Manufacturer Product # Availability
Matte Black / MD 911100 3306-004-130-001 In Stock: Ships within 24 hours
Matte Black / LG 911101 3306-004-140-001 In Stock: Ships within 24 hours
Matte Black / XL 911102 3306-004-150-001 In Stock: Ships within 24 hours
Matte Black / 2XL 911103 3306-004-160-001 In Stock: Usually ships in 1-2 business days
Matte Black / 3XL 911104 3306-004-170-001 In Stock: Ships within 24 hours