In an effort to make one of the most comfortable motorsport helmets on the market even better, we’ve been collecting racer, customer and dealer feedback for improvements on the F4 helmet since it’s introduction. 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 GEN F4 UPGRADES:
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 INCLUDING TWO GRAPHIC VERSIONS, ONE WITH THREE COLOR OPTIONS
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
[IMPROVED] INCLUDED WINDSTOPPER® LINER IS SMALL AND POCKETABLE, SNAPS ONTO FOAM COMFORT LINER
[IMPROVED] EXCEEDS SNELL M2010 AND U.S. DOT STANDARDS
[IMPROVED] MOISTURE-WICKING FOAM LINER AND LINER MATERIAL
[NEW] E.C.E. 22.05 VERSION AVAILABLE IN EUROPE
COLD WEATHER LINER WITH GORE WINDSTOPPER® TECHNOLOGY
[IMPROVED] REMOVABLE CHEEK PADS
[IMPROVED] REMOVABLE COMFORT LINER
DELUXE NYLON CARRYING BAG
SPARE VISOR AND VISOR BOLT
FLEECE-LINED COMFORT COLLAR AND BEARD FLAP
REPLACEMENT PARTS AVAILABLE - PLEASE CALL OUR CUSTOMER SERVICE DEPT. TO ORDER CALL (208)552-7433
TOP VENT COVER
VISOR SCREWS (2)
VISOR SCREW WASHERS (2)
CENTER SCREW WASHER
F4 is the most comfortable helmet I have ever used.
Super light, very comfortable , breathes just like they say it does. Worth every penny
B KaltsasHonesdale pa11/7/2013
F4 is king at beating the heat!
Wore a Klim F4 helmet over the past year in Saudi Arabia. We ride all year and summer temps often exceed 115. Tons of airflow in this helmet. Never felt like I was overheating even in the middle of summer. Any helmet will feel hot when you're not moving and the sun's baking your melon, but get moving and you feel plenty cool (I know, that's relative when the air is so hot). I broke the chin bar on one helmet when I high-sided off the top of a dune and the helmet pinched against my Leatt brace. Bought another one that same evening. Love this helmet that much!
Ken WilkinsonBack from the desert in Alexandria, VA.9/4/2013
This helmet is the BEST!
I bought this helmet knowing how good of a reputation Klim had but was blown away! I have alway been a Aria street bike guy, but wanted to try this one as the sweat..and eventual fogging of the google was brutal...Well the F4 make all that a thing of the past. I ride year round and the liner actally stops the cold as advertised and the vent move the air better than any other helmet could only dream of. Unfortuantley i seem to keep tearing off the top spoiler, but replacing them for only $2.50 cant be a better deal, plus Amanda in Customer Service treats me like a king...i always end up buying something other than just helmet parts because all of your Klim products are so much better than anything out there....its too bad you dont make boots for dirtbiking as i hate paying $500 for boots with no support...if you make some, ill surely buy some...A Very Happy Klim Customer...
Mike WoodAttleboro, Massachusetts6/26/2013
Great hot weather helmet
I ride mostly single track in the central Ca. mountains. I found I sweat alot in my helmets. This is a particularly bad thing as it leads to overheating and dehydration quickly if Im not careful. I have a Hornet and an Arai XD4, both are good helmets but neither flows air well at the slow speeds I'm riding and both end up soaking wet and hot. I bought the F4 on the recommendation of Jimmy Lewis and once again he was right in his advice. The F4 flows air so well my head stays cool no matter which speed I'm riding. I was out in 100F plus the other weekend and my head was actually comfortable. The F4 is really lightweight and the padding is nice and comfortable. I could really care less about graphics but these are nicely done. The helmet comes with a spare visor, they must know Im going to break mine off! It also comes with a skull cap for cold weather. Im not sure that will be enough but if its not Ill tape off the vents.
Id buy this helmet again.
Jeff BCentral California6/12/2013
6 5⁄8" - 6 3⁄4"
6 15⁄16" - 7 3⁄16"
7 1⁄4" - 7 3⁄8"
7 1⁄2" - 7 5⁄8"
HEAD CIRC. (IN)
20 8⁄16" - 20 14⁄16"
21 4⁄16" - 21 11⁄16"
22 1⁄16" - 22 7⁄16"
22 13⁄16" - 23 4⁄16"
23 10⁄16" - 24"
24 7⁄16" - 24 13⁄16"
25 3⁄16" - 25 10⁄16"
HEAD CIRC. (CM)
52 - 53
54 - 55
56 - 57
58 - 59
60 - 61
62 - 63
64 - 65
Replacement Parts- Please call our Customer Service Dept. to order (208)552-7433
Helmet Visor Top Vent Cover Visor Screws (2) Visor Screw Washers (2) Center Screw Center Screw Washer Mouthpiece Screw Mouthpiece