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No more excuses.

Nobody's ever accused you of being a hothead, and they're not going to start now, not when you're wearing the Giro Seam Helmet. Twelve Super-Cool vents that can be adjusted from a single Thermostat control keep things from getting uncomfortably hot and sweaty under the Seam's polycarbonate shell, even on warm days. Add to that Giro's fine-tuned Super Fit engineering, not to mention its top-flight impact protection, and you have just run out of excuses to not wear a helmet.

  • In-mold construction fuses a tough polycarbonate shell with the cushioning foam, saving weight and increasing cooling efficiency
  • In-Form Fit system lets you fine-tune the fit with an ergonomic dial, even with gloves on; vertical tuning features accommodates different head and goggle shapes
  • Super cool vents pull cool, fresh air into the helmet while pushing out heat and stale air
  • Stack vent in helmet aligns with center vent on your goggles to keep the clear and fog-free
  • Thermostat control gives you one-button control over the vents to respond to changing conditions
  • X-Static lining has silver fibers woven into it that fight odors and help regulate heat
  • Compatible with TuneUps audio systems (sold separately)

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Giro Seam Helmet

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Here's what others have to say...

5 5

Great helmet!

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

Excellent helmet. Snug fit, and very warm.

5 5

Perfect Lid!

  • Familiarity: I've put it through the wringer

The Seam is by far the most comfortable helmet I have ever owned. Everything from the plush chin strap to the micro-adjustable fit system ensure that the fit is snug yet comfortable enough to ski all day without any hotspots. The thermostat control is super convenient, allowing for on-the-fly adjustment even while wearing mittens or gloves. The helmet has enough space for a thin beanie underneath, allowing me to ski in some seriously frigid weather. The ear pads are removable, ensuring you can keep your noggin cool on those warm spring runs. The brim is enough to keep some of the sun out of your eyes, yet still allows you to rest your goggles without having them flop off the back. Stack vent keeps your goggles breathing nicely, and the light weight of the helmet itself is nice on those all day journeys.

Overall, a great product... can't ask for much more when it comes to a helmet.

5 5

Comfortable and stylish

  • Familiarity: I've used it several times

I love this helmet. The Giro Tune-ups fit perfectly in the ear-slots. It is extremely comfortable and I am able to adjust the vents throughout the day depending on the temperature. I thought I wouldn't like wearing a helmet but the Seam has changed my mind, it is an excellent safety addition to my winter wardrobe.

3 5

Nice helmet... but it pinched my ears.

  • Familiarity: I've put it through the wringer

The Giro Seam helmet is well made, the adjustment works GREAT, and the vents worked OK... slide action on lever was not very smooth, they froze open or closed few times, and for some reason one if the vents never closed 100%, but I never noticed the tiny opening on one vent... I give the vents a B+.

No major complaints with the function and durability of the helmet.

It is the fit I have issue with- The darned thing pinched in on the top of my ears! I was right in the middle of the M and did not have it adjusted all the way open. So the helmet was not too small for me, but the ear flaps hurt. They are plastic reinforced and they aggressively angle in- I suppose to hug your ears tight and keep you warm. They were not noticeably uncomfortable when I first put the helmet on, just snug, but everyday after a few hours my ears started hurting. I did some mods (removing foam and a bit of plastic ) which helped but didn't fix the issue .

After a season of trying to make it work, I got rid of the helmet.

Conclusion- Good helmet if it fits you. Probably deserves 4 stars, but I'm giving it 3 so people can see a less then stellar review.

5 5

Very solid, comfortable helmet

  • Gender: Male
  • Familiarity: I've used it several times

My last helmet was a pain because of its weight, but the Seam is super light; I forgot I was wearing it within minutes. I love the sealable venting--there's lots of it--so you're comfortable in a variety of conditions. Very good looking as well, with a small brim. Most of all though, the click-adjustable sizing is a dream. Helmet is easy to fit firmly without being tight, and so easy to adjust you can do it while boarding. Nothing but praise here.

5 5

Seamless fit, Mom Approved

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

I bought this as a gift for my mother. She has always struggled to find a good fit between her goggles and helmet, but finally she bought some Giro goggles and they fit seamlessly with the Seam, what irony, right?! Her other favorite feature is the ventilation, she often gets a little hot headed (pun intended), but has no complaints about keeping cool and comfy in the Seam!

Is this helmet unisex and are the ear pads...

Is this helmet unisex and are the ear pads removeable?

5 5

You'll love it

  • Gender: Male

This is by far the most comfortable ski helmet that I've owned. I would recommend it to anyone, it's lightweight and comfy. The vent controls and the adjustment wheel work well and are easy to use with gloves on. The helmets brim feature matches up pretty well with any goggle, and its pretty warm. I run kinda hot but I don't have to use anything but the helmet unless it gets into the teens.

You'll love it
5 5


  • Familiarity: I've put it through the wringer

I got this helmet free brand new, but I still enjoy it & have no complaints. Giro makes good stuff, you can size it fairly well. Don't have a big gaper/beater/joey gap with the Smith I/O goggles I use, if you use a Buff headband underneath you fix that problem 100%.

Put a goat on it

Put a goat on it

bc goat, goggle retention strap, and In-Form Fit dial, in descending order.

5 5

Protect Your Dome

  • Gender: Male
  • Familiarity: I've put it through the wringer

excellent lid.pair it with some giro gogglesfor a solid fit that keeps the cold out. vent on the brim helps vent goggles. and the single control for all the vents is nicer than having to adjust both side individually. the padding on the chin strap is a little weird but you don't really notice it. second best of all (most important is your brain), no stank!

i still take it off when hiking or skinning, but i run anyway.

5 5

Bright, light, and comfortable

I bought this for my Dad, but I ended up wearing it a few times too. My wife also used one for a few years. We got the red color and it definitely stands out on the slopes. It's easy to spot among the crowds at the resort. It's also quite comfortable. I have a roundish head and this fit very well once I used the adjustment.

Also, my wife hit her head quite hard last year which left a big dent in the helmet, but she was fine. So seems like it works for protection too (which is why we have it).

5 5

Giro Seam Helmet

After owning a few snow helmets i've found the Giro's best of all. My last one was a MX G10 Which i really liked the MX style but a pain when lifting goggles up because of the peak. The seam combats this problem with having just enough of a peak to do it's job and be stylish. All the other features comfort/ adjustability second to none which i would only expect from one of these lids. 5 star from me!

5 5

Great Lid

Key Features: Comfortable fit, Stack Vent is great for the goggles, and the Thermostat control is easier to use than previous versions.

5 5

Nice comfortable helmet

Fits really well and is very comfortable and warm. The ventilation also works well.

Unanswered Question

can you use the GoPro strap for vented...

can you use the GoPro strap for vented helmets with the Giro Seam?

5 5

Light low pro that pairs with the I/O

actually sized down to a medium and I have a neandrothal oblong head. Measure 23.2". I own a Giro Nine-Ten in a Large. It fits where a medium does not. The Smith Vantage and Giro Montane I need a large but they look like bowling balls..big. Never liked wearing helmets much but the Seam is comfortable, light and stylish. Have so many cool wool hats that I have had made at Wapiti Woolies over the years. Looks like they will be dedicated to apres ski. I bought the Black Boneyard model and pair it with the Smith I/O in Republic Red. Wife likes the combo and that I am actually wearing a helmet after all these years.