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Klim F4 Helmet
  • Black/White
  • Black/White
  • Orange/Black/Grey
  • Orange/Black/Grey
  • White/Blue/Red
  • White/Blue/Red

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Video Reviews (2)

Klim F4 Helmet Videos

Klim F4 Helmet

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 4.7 5 3 3
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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Have a functionality, fit, or otherwise product-specific question about the Klim F4 Helmet? Ask it here! If you have a customer service or shipping question, please direct it to our Customer Service department.

Klim F4 Helmet
Already Asked: 4 Questions, 4 Answers
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RevZilla Store asked: Why did you choose this?
Brad C: The Revzilla product review for this F4 helmet helped me in this purchase decision. I decided to go with the Klim vs. another brand due to their attention to detail and the extras that are included. I have other Klim products and am very impressed with the quality of the products. Dec 1, 2013
A shopper asked: I wear an XL in HJC and Arai helmets - long oval head shape !

What size Klim F4 would fit me best ? XL or XXL ?
Dec 4, 2013
Answer this · Send to friends Good question? Yes (0) No (0)
Randy J: KLIM seem to be a bit larger, I wear a XL Shoei and ordered the KLIM XL and was too big. Dec 4, 2013
Reply to Randy Good answer? Yes (0) No (0)
A shopper asked: is there any plans of KLIM making a face shield?! Sep 16, 2013
Answer this · Send to friends Good question? Yes (0) No (0)
SPENCER C: I would not know the answer to this question. I no longer have this helmet because I lost 60 pounds and it no longer fit.
Call on e-mail Klim USA they are real good about getting back to customers and potential customers..
Sep 16, 2013
Reply to SPENCER Good answer? Yes (0) No (0)
A shopper asked: What country is used to manufacture these helmets? Feb 24, 2013
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RevZilla: Currently, the Klim F4 Helmet is made in China. Feb 26, 2013
Reply to RevZilla Good answer? Yes (0) No (0)


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 1/4" - 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 SKU ID Manufacturer Product # Availability
Black/White / MD 721131 3206-130-000 Out of Stock
Black/White / LG 721134 3206-140-000 Out of Stock
Black/White / XL 721137 3206-150-000 Out of Stock
Black/White / 2XL 721140 3206-160-000 Out of Stock
Black/White / 3XL 721143 3206-170-000 Out of Stock
Orange/Black/Grey / MD 721133 3206-130-400 Out of Stock
Orange/Black/Grey / LG 721136 3206-140-400 Out of Stock
Orange/Black/Grey / XL 721139 3206-150-400 Out of Stock
Orange/Black/Grey / 2XL 721142 3206-160-400 Out of Stock
Orange/Black/Grey / 3XL 721145 3206-170-400 Out of Stock
White/Blue/Red / MD 721132 3206-130-182 Out of Stock
White/Blue/Red / LG 721135 3206-140-182 Out of Stock
White/Blue/Red / XL 721138 3206-150-182 Out of Stock
White/Blue/Red / 2XL 721141 3206-160-182 Out of Stock
White/Blue/Red / 3XL 721144 3206-170-182 Out of Stock