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K2 - Route Helmet

K2 Route Helmet

50% Off
$74.98 Original price:$149.95
Changing the size selection, or changing the selected color after selecting a size, may change the associated price

Item #K2S003Y



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California Proposition 65


This product can expose you to chemicals including Bisphenol A (BPA), which is known to the State of California to cause cancer. For more information go to

Tech Specs

Shell Material:
Impact Foam:
passive ventilation system
Fit Adjustment:
Boa Fit System
CPSC 16 CFR 1203, EN1078:2012, ASTM F2040, CE EN 1077:2007 Class B
Claimed Weight:
Manufacturer Warranty:
1 year

Light, lighter, lightest.

Checking in at just 11oz, K2's Route Helmet is the lightest snow helmet on the market. It takes its cues from climbing helmets—just check out the ventilation system. The polycarbonate shell and EPS foam liner are fully certified for skiing, snowboarding, and even biking protection. The earpads are removable, as are the fully adjustable headlamp and goggle clips, making for a fully customizable package whether you're in the resort or the backcountry. K2 teamed up with Boa to provide the fully adjustable Boa FS 360 fit system and also included a stretchy waterproof cover that provides the Route with serious weather protection when you wear it during storms.

  • Polycarbonate shell
  • EPS foam
  • Boa FS 360 fit adjustment
  • Passive ventilation system
  • Removable ear pads
  • Adjustable, removable goggle and headlamp clips
  • Waterproof cover

Nice helmet, but for sunglasses only.

  • Familiarity: I've used it several times

Like the other reviewers, I removed the side pads on the boa, as they dig into you head (I have an oval head). I also found it only works with sunglasses, so I Dremel'd out a bunch of foam under the brim to fit Julbo Aerospace googles. It took about an hour and a half skimming off a little at a time to get it right, but it actually works well with googles now. Kind of a hassle, but polystyrene foam cuts super easy and it's a nice helmet otherwise.

Good Versatile Helmet

  • Familiarity: I gave it as a gift but have feedback to share

The K2 Route Helmet was purchased as a gift for my dad. It seemed to work great both at the resort and in the backcountry. It is extremely light and fits his head fairly well, without being too snug. With a liner inside, it isn't too bad on the single digit days but the "snow/rain" cover that is provided isn't as suitable as expected/doesn't seem to work very well.

Crappy, but light...decent enough

  • Familiarity: I've put it through the wringer

Crappy beer-cooler helmet. Super light. More protective for skiing than wearing a beer-cooler climbing helmet, which is why I use it. Basically all the features are fairly lame. Put it on your head, go skiing. Don't expect it to look good, or for any of the doodads to work much. And don't pay full price...probably worth about $70 at best.

This is a ridiculous review. This helmet is amazing for high-end use cases. Mountaineering on Rainier, ice climbing in Ouray, even just banging laps at your local hill. Best bang for your buck and light as hell. Super versatile lid that I would argue is modular, given how many use cases you can fit it for. Ignore this review and buy the helmet if you think it fits your intended purpose. I've had this helmet since 2015 and it is still market-leading in terms of weight and performance.

Not What I Expect from k2

  • Familiarity: I've put it through the wringer

First off let me just say that I have had nothing but good experiences from K2 in the past, and I thought that this would be another quality product.

And it is... kind of. The helmet has some great features. The venting system is unparalleled for those with hot noggins, the Boa lace secures like none other, and this thing comes with more bells and whistles than a bell and whistle.

I don't know what K2 designed this helmet for, but it's definitely not skiing. This thing is compatible with absolutely zero goggle systems. I tried my current goggles, my old goggles, my friends goggles, a lifties' goggles... literally all of them fit funky and ended up being uncomfortable after about half an hour. It works great with sunglasses... but that's not what anyone except for old school teles and Texans wear when they're going down hill. It is designed mainly in mind for touring, which is why I think it fits sunglasses best. But I've never met anyone who wears their helmet while they're skinning unless it's next to some pretty gnarly terrain. Frankly, this helmet is pretty useless for downhill.

My other problem is that this thing is way too fragile. I managed to take a tomahawk or two down a couloir at Whistler and snagged something underneath the snow on a rotation. I was glad to have a helmet on for sure- but the outer shell dented like a Toyota in a hail storm. Seriously, I've put 5 hardcore days in this season (plus some others) and the helmet is already pretty damaged. Pretty much all of my helmets I've had in the past have held up way longer than that. Now I'm trying to figure out if the thing is going to break if I take a hit to the same spot, and if the inner foam is still good.

I'm sure somebody can find a use for this thing judging by the high star reviews on here. Honestly though, save yourself some dollars and go buy a Smith helmet if you plan on wearing any kind of goggles, even if it's just for a descent. Not super impressed with K2 on this one.
(For those wondering, the goggle models I tested with this helmet are Smith IO7's, Zeal Voyager's, Anon Hawkeye's, and Oakley A-Frames. Of those, the Zeal's worked the best but still fit strange)

Disappointed too.

  • Familiarity: I've used it once or twice and have initial impressions

I was looking for a cool and well ventilated helmet for daytime ski.
This helmet seemed ideal for me.
But I can say this helmet is definitely NOT for ski.
This might be good for climbing or biking
As mentioned earlyer, this helmet cannot work with snow goggles in the same reason.
This helmet goes together with sports glasses, that's why ear flaps are open and widen, I guess.

If your head circumference is exact 59cm, buy M.

Could be a better fit

  • Familiarity: I've put it through the wringer

I have a 54cm head and wear a under it. Together it makes a perfect fit. I had to remove the padding on sides of the boa guides. They were creating a very uncomfortable pressure point. I have a pointy head and feel that there is alot of space on the sides when I don't wear the beanie. It still fits great and doesn't move around at all with or without the beanie, The boa does a great job holding. Over all it's a great helmet for touring and dose a good job breathing.

Could be a better fit

Pad your noggin and you'll be rockin

  • Familiarity: I've used it once or twice and have initial impressions

Nice design and accessories. Love the pow cover and the retainer clips for the lid, light, and goggles. Like the Boa adjustment. Also like the carry bag with zippered compartment for goggles or glasses, clips and pow cover. Not impressed at all with the internal padding! Spent 30 mins adding my own padding with velco bits. Ironically, used extra padding from one of my POC ski helmets to complete the fit. Used it on a winter MTB ride. Buy it if you are willing to custom fit and pad your lid!

Sometimes you gotta use your noggin-

  • Familiarity: I've used it once or twice and have initial impressions

Hey there friends. The helmet weighed in at 11.1 oz for me after i removed the two inspection stickers. Folks are having an issue with fit clearly. If you spend a little time looking at the inside of the helmet you will see in the back near the boa adjustment there are several attachment points. One can pop the harness out at this point and re-attach it at a higher point to raise the brim of the helmet. This helped me to relieve some minor pressure i felt on my goggles. The fit is pretty rocking in my opinion. I'm usually a large, but i bought a medium and i can fit a wool beanie my lady knit no prob. I wear a 7 1/4 ball cap. Go twins. Its a nice helmet, but it does seem fragile just like all this ultralight junk. Be careful not to hit you head!

Nice helmet!

  • Familiarity: I've used it several times

Finally ! I have a helmet that I can where a toque under. I really like this bucket - only qualms are that it is a bit of a mushroom and the ear flaps dont really keep you warm unless you are wearing a beanie which isn't so bad because I take the beanie off for the up track and then it breathes quite well. Ive used it on a few tours and my goggles fit fine - not sure what other people are complaining about in that respect - maybe I just have a big head...haha

Also - now I have a winter bike riding helmet - BONUS!

Doesn't work with Ski Goggles

  • Familiarity: I've used it once or twice and have initial impressions

I ordered this helmet looking for a light-weight ski touring helmet. I ordered the medium (which is my normal helmet size) and it fit my head well; however, as other reviewers have pointed out, it came down all the way to my eyebrows in the front. This means that you CAN'T WEAR IT WITH SKI GOGGLES. Being advertised as a ski helmet with goggle straps I find it unreasonable that it doesn't work with ski goggles. I've owned other ski helmets in the past and have never had this problem.

In summary, if you want to wear goggles with your ski helmet (even occasionally) don't buy this one.

What goggle type did you try with the K2 Route

What goggle type did you try with the K2 Route

Just taken delivery of this helmet and was worried by the reviews talking about fit, however seems to work fine without moving the boa frame as detailed in another review. I was a L in a RED Hifi 2 and I am a large in this and the Diversion Pro. It seems to fit with my POC Iris Bug or Oakley Canopy goggles, probably better with the Oakleys. It is weirdly light and the padding is minimal but that's what I bought it for.....

Equally disappointed

    I was stoked to get this helmet and after measurement ordered the L/XL. It was too big of a shell and there was an inch of space between my ear and the earflaps on both sides (think elmer fudd with extra starch) . I returned it, and after realizing no store in Colorado stocked these, ordered the Medium. It arrived and while the shell is the right size and a viable fit, the BOA guides on the side painfully pressed into my skull above my ears (Ski2BeFree's side pads). My net opinion:

    1. BOA still rocks as I have it on cycle shoes and my Aliens but this is a poor implementation.

    2. K2 might need a tweener size as the leap from M to L/XL seems too coarse, at least for this previously believed to be average head.

    3. is viable even for sizing things. I chatted for the first time to ask about removing the inside the helmet BOA side guides and they promptly answered and generated a free return shipper.

    So disappointed in K2, impressed with backcountry

    Couldn't agree more. I have a large head, not sure the exact size but larger than most folks. I also felt that while the boa system would tighten around my head, there was a huge gap between my head and the helmet - including the ear flap gap you mentioned. I thought about a M as well, but the boa side pads were already too tight on my head to even consider going down a size.

    Could I ask you, what is your heads circumference? Just hinking about what size should i buy.. I have a head circumference about 59-20 and K2 Rival was just a little bit too small for me.. just thinking if there is some adjusment range with the Boa system so that M would fit to my head.. Thanks!

    Route Helmet

      Kayla have you skied with this k2 helmet? If so did it fit with your goggles?

      Very disappointed

      • Familiarity: I returned this product before using it

      I was looking for a well ventilated and lightweight helmet for ski touring. I traditionally use a Smith Maze, but wanted something with better ventilation for booting and ski mountaineering. I was very disappointed to find that this helmet is surprisingly bulky, and is also slightly heavier (1 oz) than my Maze. Not a huge deal obviously unless you're selling your helmet as the lightest ski helmet available. The goggle clips are awkward to use. The side pads squished my head, but fit can be a very personal thing.

      I was really looking forward to this helmet as it seemed to fill an empty niche in the helmet market - a lightweight, ventilated backcountry helmet. But overall I found it to be a poor design. I will return it.

      I agree ski2befree....this helmet is great if you don't ski with goggles. Mine came so far down on my forehead my 10 year olds junior goggles did not fit.


      Head Circumference

      18.9 - 20.1in

      (48 - 51cm)

      20.1 - 21.6in

      (51 - 55cm)

      21.6 - 23.2in

      (55 - 59cm)

      22.8 - 24.4in

      (58 - 62cm)

      How To Measure:
      Measure just above the ears, not too loose and not too tight.