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Read and compare owner reviews & ratings of Klim F5 KOROYD HELMET ECE/DOT. Product specs, photos & video, pricing, and more!

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  • Price Range $500.00 ~ $649.00 Shop Now
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When I started Dirt bike Trail riding I decided to do whatever I could to mitigate the risk of injury by buying high end equipment out the gate. This meant heavy and hot too! I am now used to all the gear I wear and I have had a few spills where I was thankful for having it on. However I tend to heat up quickly and perspire like a waterfall when I am exercising so for me heat became a much bigger problem than I thought it would be especially wearing a full face helmet. In the technical stuff I have to stop often and take it off to cool and I have probably come close to heat being a very serious problem a few times which was scary! 

So I started hunting for a new helmet with safety in mind but also wanted to make sure it was something that would offer the best possible venting for me especially at low speeds in technical trails.

My thought process

Safety - I have always been a Snell rated or nothing kind of helmet guy but given no Snell rated helmets that I could find offer what I would call super venting at lower speeds, I decided ECE would be acceptable if I could gain super cooling and so my attention went towards the Klim F5. The venting on this helmet looked pretty radical to me compared to anything else I looked at and I could not help but think if the Koroyd is possibly better at absorbing impact and MIPS might help reduce rotational forces mixed up with super cooling, this all makes sense. Right ? So F5 Koroyd it was !

Sizing - In all the reviews I saw online the consensus was this helmet is an intermediate oval, which for me is perfect. This head shape rules out so many brands it sucks. But I checked sizing and I am 58” , I  purchased a Large which Klim specs for 58”-59”.

I hunted down a deal and pulled the trigger. With the burning desire to spend more money on this addiction fulfilled, a week later ding dong, guy in a brown van at my door with a nice big box !

(Thank you truckers for delivering everything we consume especially during these crazy times)


Helmet comes in a decent box, inside was a great looking Klim helmet bag and inside that was a shiny new helmet all wrapped up in foam sheet. Included in the box was cards describing all the features and tech, usual paperwork none of us read and some stickers, extra hardware, an extra visor, cold weather mouth guard and wind stopper liner. Visor seems a little stiff, I would imagine a slight knock and it will probably crack but I will reserve judgement until my theory is tested. All items as shown in the many reviews online. In my opinion, all helmets in this price range should have decent bags and these spares included. Nicely done Klim!

First impression when I took the helmet out was this is light and it is heavier than it’s EPS sibling, WOW! Out came the scale, compared to my HJC the F5 Koroyd is 296g /10.4oz less ! Hold the helmet to the light and you can see right through all the Koroyd and out the vents, this is serious venting ! Paint finish looks decent, colors to me look awesome in person.

As for the fabric it is comfortable but perhaps not as soft as some other premium helmets and the foam in the head liner and cheek pads appears to be a pretty low density compared to other helmets I have used and seen. However, I reminded myself that all of this probably helps to play a role in the weight, venting, moisture wicking and cooling this helmet is clearly designed to provide. So I do not want to pass judgement until I get to use it. I am confident the choice of materials are for good reason.  


I tried it on and it fit which was awesome !! Most helmets don’t but I did feel the cheek pads were a little thin. I sort of expected this since I am at the low end of the large sizing. The Klim sizing chart explains the options pretty well but I wanted to be sure so I contacted Klim for their suggestion and was advised to get the 20mm pads.

This makes the Large a Medium although you can also reduce the head liner if you need to make the whole helmet fit like a Medium. In my case the head liner fits perfectly so being able to just switch out the cheek pads is really nice. Hopefully I will land up with a somewhat customized fit. I am now awaiting the 20mm pads. To be continued…

Theory Over Let’s go ride!  - Reality Check , trails don’t open here until next Month !

Riding - to be continued

Venting - to be continued

Conclusion for Now

Happy with what I have received, overall looks to be well made, confident the larger cheek upgrade will make it perfect and now looking forward to trying it out. To be continued….

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