Giro Atmos Helmet

Priced: $89.96 - $180.00 Rated:   - 5 stars out of 5 by 15 reviews.
Giro Atmos Helmet
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Color: Highlight Yellow / Black
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Giro Atmos Helmet -

How much do we love the Giro Atmos Helmet? So much that it's been a permanent fixture in our cycling closets since it first appeared on the scene. Sure, we've flirted with some new, good-looking lids, but we've always come back to our true love, the Atmos.

The Atmos was the first helmet that ever looked amazing, while also saving our lives. It had tons of air channels, it was lightweight, and it was seriously durable -- this was still back when most helmets looked awful and weighed heavily on the head. And today, it still looks so cool, and works so well, that it's the most popular helmet that we've ever sold. The Atmos was so groundbreaking because it was the first helmet that made use of Giro's In-Mold Composite reinforcement. Through the use of this construction process, the outer shell has been permanently fused to the impact-absorbing, EPS foam liner. This process enhances the effectiveness of both parts. In fact, the fusion process actually reinforces the formerly vulnerable spots around the vents and ribs. It results in a lighter, more durable, and better-ventilated helmet. The Roll Cage internal reinforcement gives the added protection that you'll be glad to have next time someone takes you down in the final corner of a criterium.

The amazing comfort that the Atmos offers has been one of the main reasons for its longevity. Giro has taken over 20 years of helmet design to establish its proprietary, Super Fit Engineering. This means that Giro has created the helmet in three sizes based on 'human scale factors' data that have amassed throughout its history of handcrafting helmets. The helmets are intended to fit snugly and securely, while still accommodating the vast majority of head sizes.

Giro's development of its Roc Loc 5 Fit System makes those micro-adjustments possible. With the Roc Loc system, you can custom tune the fit tension as well as the fore-aft tilt of the helmet in seconds with one hand. Though other helmet manufacturers have similar adjustability options, none of them even come close to the weight savings that the Roc Loc system offers: it's almost 40% lighter than comparable systems.

Keeping your head cool during even the hottest, most critical road races is something that Giro has focused a great deal of attention on. Accordingly, its helmets are developed with a proprietary Wind Tunnel Ventilation System. Basically, it's an elaborate design that combines 26 vents in the shell with exhaust channels within the belly of the helmet leading to the rear. The effect is that the fresh, cool air from the front is strategically channeled around the head to help evaporate the sweat, then out the rear exhaust openings. It's a natural cooling system that you'll appreciate every ride.

The Giro Atmos Helmet is available in the sizes Small, Medium, and Large and in the colors Highlight Yellow/black, Matte Black/blue MC Hesheer, Matte Black/white, Matte Titantium, Matte White/silver, and Red/black. It also comes equipped with Giro's X-Static padding.


  • Roll Cage reinforcement adds a web of DuPont nylon molded inside the EPS foam liner for added strength
  • In-mold construction fuses a polycarbonate outer shell with an impact-absorbing foam liner


  • Roc Loc 5 fit system offers one-handed adjustment of fit tension and vertical position with a ratcheting, micro-adjustable dial


  • Wind Tunnel ventilation system combines active vents with internal exhaust channels that thrust cool air over the head and force hot air out
  • 26 Wind Tunnel™ vents combine active vents with internal exhaust channels to make sure air keeps moving for maximum cooling


  • Featherweight webbing with Slimline buckle


  • Made in China


  • Roll Cage™ reinforcement provides an extra measure of strength and integrity that you'll never notice (unless you need it)
  • US shipments only
  • The Giro Atmos helmet features an integrated, low-profile silhouette that helps it weigh in at a featherweight 280g
  • In-mold carbon reinforcement fuses a tough outer microshell to the helmet's liner to create a light, cool and tough helmet
The Giro Atmos is crazy lightweight and features a Roll Cage internal reinforcement, that offers riders more safety at high flying speeds. It also features an in-mold polycarbonate shell with EPS liner that gives the helmet a unique design for air to flow through the helmet. This system along with the 26 wind tunnel vents allows the utmost ventilation for the rider. Features the Roc Loc 5 fit system so the rider can make sure the helmet fits properly. Other various riding uses include triathlon, MTB XC racing, and urban commuting.

Sierra Trading Post
A premier road performer, Giro's Atmos cycling helmet outpaces the competition with easy adjustability, huge cooling vents and lightweight In-mold construction with Roll Cage reinforcement for added strength.

Massey's Outfitters
Legendary performance, style and comfort. The Atmos™ was the first helmet to utilize In-Mold™ Composite reinforcement, a breakthrough in helmet architecture that allowed greater ventilation without compromising a helmet’s integrity. The compact shape offers matchless style, and features the sure feel of a Roc Loc® 5 system that cradles your head comfortably and securely. It’s no wonder this helmet continues to be a favorite with road, XC and cyclocross riders worldwide.

There's no need to worry about carrying excess weight up steep climbs with the Giro Atmos™ helmet; extremely lightweight but incredibly strong materials ensure maximum protection.


Al's Sports
Atmos continues to set the standard for high performance, matchless style, and comfortable fit. Its low profile silhouette, 26 Wind Tunnel vents, and benchmark in-mold Roll Cage make it a top choice for road, ‘cross, and XC riders alike. Suggested Use: Road Race, Triathlon, MTB XC Race, Cyclocross, Enthusiast Road, Urban/Commute and Touring Top 25 Category Product
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Average Price History: Price History
Review RatingNumber of Reviews
Activity:Road cycling
Fit system:Roc Loc 5
Head circumference:Road cycling
Helmet style:Road cycling
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Giro Atmos Helmet Reviews:


Proof of Crash Results

I bike commute (40 mile roundtrip), road bike, tour and mountain bike.

I have always hated wearing a helmet. The fit was always terrible. Ventilation was poor. My last helmet actually had plastic that cut my forehead when I wore it. Needless to say I only wore it during events that required a helmet.

I finally decided to spend the amount of money required to be comfortable in a helmet. I went in with a lot of doubt that regardless of the cost - I would still hate wearing the helmet.

I am full grown man but based on the sizes I ordered a medium. It fit me perfectly but I had a slight complex that the helmet was 'too small' for me. This was due to the size of medium and nothing to do with the actual fit. The first time I wore the helmet I was in love. I did not even notice I was wearing a helmet. That kind of says it all for someone that never wanted to wear one in the first place.

The true test came in the 2013 RAGBRAI. I went down at about 15 mph in a corner. My front tire was jammed between another rider's bottom bracket and crank. I saw the tire jammed and the next thing I knew my head slammed the pavement. Absolutely no time in between to react or make other decisions. I had road rash on my hands, elbow and leg. BUT my head was entirely trauma-free. The helmet cracked in several places but it did its job and saved the day. I would never have finished the RAGBRAI and might not be typing this if not for the helmet.

Do yourself a favor and find a helmet you will actually wear and do it.
tenaciousdja at REI on 10/10/2013

I've owned at Atmos for the last year, I love the fit, ventilation, and weight.
When it came time to shop for a lid for the lady, the Atmos was my first suggestion. After trying on a bunch of models and brands, she loved the fit of the Atmos the best. The retention system can accommodate a pony tail fairly easily; an important feature as she has long hair. The retention adjustment also makes for a very secure fit.
We got her the matte titanium colorway, we both love the look and I'm a little jealous that hers looks better than my standard black one.

Ben Kuhns at on 06/03/2013

When i started road riding, I found out real quick that a lighter, more ventilated helmet made for an easier ride temperature wise. So, I started out with the Giro Atmos Helmet and was glad I did. The 26 vents almost keep my head too cool and the roc-loc 5 keeps the Atmos snug on top of my head after a bit of adjusting.
Sizing can get a little tough if you are right at the 55cm (common) head size. I went with a medium and had to play with the adjustments a bit, but was able to get a snug fit.

Wally Phillips at on 07/15/2013

It made me faster! No, really!

This is now my everyday helmet for both road and trails. It's noticably lighter than my old Giro Havoc. The fit system and pads are easy and minimal. The ventilation is excellent.

My only concern is the exposed styrofoam on the underside edge of the helmet. That always seems to get dinged up in my world. Helmets need to be able to rattle around with large, heavy, sharp and pointy things inside vehicles, and survive getting thrown off to the side of a trail.

Strava says I'm faster! Sadly, its not the helmet.
Wade solpwr at REI on 06/06/2013

Unbelievably comfortable

I purchased this helmet about 4 years ago and is by far the most comfortable helmet I've ever worn.
I was always sweating in my previous helmets to the point where I'd take them off and hang them on the handlebars on inclines. Not only do I keep this helmet on through the entire ride I don't even unstrap the helmet when I stop for breaks. I couldn't possibly give this helmet higher marks. Thankfully, I have no idea how it handles an impact.
It's very expensive but it could be the last helmet you ever buy.
owmyheadhurts at REI on 05/05/2013

Awesome Giro. The Atmos is a must!

I use the Atmos for both Road biking and Mountain biking. It's great for both. The form factor allows for great ventilation and a weight that makes it almost impossible to even notice the helmet. There is an area on either side large enough for a mirror mount as well. The price tag made me a little skeptical, but it's well worth the money. It's very hard to put a price tag on safety.
On my feet all day at REI on 05/05/2013

This is my second one of these.

My previous helmet of this model was destroyed protecting my head...went down head first on pavement at 22mph due to newbie in the pace line. Cracked the helmet in 5 places...didn't lose consciousness but everything did go black with my eyes open for about 15 seconds. Called Giro who recorded the serial # and gave me a discount credit for a replacement helmet. Buy it!
A1A Rider at REI on 01/01/2014

Great fit, Great ventilation

I got this helmet because my old one had a bunch of dents. It was quite old, so it was just time. I have never bought a helmet this expensive before, but it was totally worth it. The ventilation is really superb, and the fit is way more comfy than my old helmet. Its even lighter than some hats I own!
Steeveo at Campmor on 08/08/2013

good helmet, expensive

It's well ventilated and light, huge difference in comfort over cheaper helmets I've used. The reason I didn't give it 5 stars is that the finish is rougher than I'd expect from something at this price point. (Rough edges on the styrofoam where it forms points, for example.) Watch for a sale, then it's a solid buy.
M1ke at REI on 06/06/2013

I've owned 2 Atmos helmets (first one did it's job and protected me during a severe crash). Atmos fits my 59cm head perfectly and has room to expand when wearing winter head coverings. Top it off with excellent support from Giro when the pads broke down prematurely and this one is a winner.

skinny cyclist at on 01/03/2014