Gear Review- Petzl 2017 Sirocco Climbing Helmet

The arrival of the updated ground breaking Petzl Sirocco this summer may be my most anticipated piece of gear news this year! I enjoyed hundreds of days climbing rock and ice along with a decent amount of ski mountaineering in my original Sirocco that I reviewed back in 2013 here. Needless to say I was pretty stoked to get my hands on a media sample of the 2017 model earlier this Spring and have since enjoyed over 30 days of both cragging and alpine climbing in this new model and I can say with complete conviction that Petzl has taken something great and made it even better!

Petzl 2017 Sirocco Helmet Review
Petzl 2017 Sirocco Helmet Review

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Earlier this Spring I explained some of the basic differences between the outgoing model, the new 2017 Sirocco, and the current Petzl Meteor III helmet in this video:

Now I would like to dive into some of the details that make this the ultimate climbing helmet in my opinion, starting with the most obvious specification…


Anyone that reads my gear reviews knows I can obsess a little about weight. I love counting ounces and trimming weight in every category I can. The original Petzl Sirocco was indeed a game changer weighing in at only 6 ounces (170 grams) for my M/L size. My home scale shows the new model weights 6.125 ounces (172 grams). The closest competitor in regards to weight is likely the Black Diamond Vapor Helmet which comes in at 7 ounces (199 grams). But weight should really be secondary to…


This was actually what sold me on the first incarnation of the Petzl Sirocco, the fact that it exceeds EN-12492 certification and meets UIAA-106 standards! In fact Petzl helmets were the first climbing helmets that meet this higher standard!

Petzl 2017 Sirocco Helmet Review
Petzl 2017 Sirocco Helmet Review

Whoa… wait a minute… what the heck does all that mean?

Let me break it down.

Simply put, Expanded Polypropylene (EPP), the main material used in the construction of both the outgoing and the new 2017 Petzl Sirocco helmet has an excellent “energy absorbing” quality to it along with being quite rugged and durable. Essentially the difference is this helmet will transfer less energy to your melon (and neck) in the case of a hard hit.

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The EN certification most helmets meet puts that amount of force at 10 kN but the Petzl Sirocco is tested to only transfer 8 kN. This is roughly 450 pounds less in force. This could mean the difference between suffering a more serious injury in a hard hit than when wearing a helmet that might “feel” more durable but transfer more force to the climbers head and neck. Skip to 1:20 in the below video to see this stress testing in action. (video is of 2013 model but physics point are the same)


In addition to the reduced impact force Petzl helmets are tested for “side impact” as well… something not yet required to pass a more general CE standard. As a climber, Wilderness First Responder, and Mountain Rescue Service member, I have seen a fair share of head injuries, some minor, some quite major, I can say that the entire head deserves protection… not just the top!

Finally in terms of “protection” one should note that the new design covers 2-3 cm lower on the back of the head… a common spot of injury in both ground falls and “rope behind the leg” leader falls.

Bottom line is the new 2017 Sirocco offers greater protection to your head than the previous model without gaining a single ounce!

So what about the next important consideration in a climbing helmet?…


Originally essentially a “one material” build Petzl has made to significant structural changes to the Sirocco design. The first is found inside and is an crown injected with expanded polystyrene (EPS).

Petzl 2017 Sirocco Helmet Review
Injected Polystyrene Liner

This material adds some ruggedness and durability to what at times could feel like a fragile construction material (the expanded polypropylene that some folks assumed was “Styrofoam”). While expanded polypropylene has excellent protective qualities it could show wear after a few seasons of hard use. My 2013 model has quite a few dings from random ice hits and possibly packing it in my pack a little too close to sharp crampons. Despite the dings I never felt the performance of the helmet was compromised, but the addition of a denser material under the crown makes it feel like this construction will have a longer life than the original Sirocco. Further research actually indicates that EPS actually has even higher energy absorption properties than EPP and is less durable than EPP, which is probably why Petzl added…

Petzl 2017 Sirocco Helmet Review
The author at work in his office

Durability x 2!

Petzl also added a poly-carbonate crown on the top of the helmet, the same great material that covers the whole shell of the popular Petzl Meteor III helmet. This hard yet light plastic will certainly fend off small hits of ice and rock and increase the service life of the helmet.

Petzl 2017 Sirocco Helmet Review
Poly-carbonate protective “crown”

Having considered the most important considerations like weight and durability it’s time to look at some other performance characteristics… like…


The 2013 Petzl Sirocco was the most ventilated helmet I’ve ever owned, and the new 2017 model is no different. The design of the ventilation holes have drastically changed but by my estimate the ratio of material to “open space” is roughly the same. The 2013 model had 24 ventilation holes and the new model also has 24. As you can see from the comparison photo the older model had longer thinner vents and the newer model has wider more square like vents. If one was to measuring the difference in actual performance between the too I imagine it would be a pretty close tie. This brings us to some more “stylistic” changes…


The 2013 Petzl Sirocco had a noticeable “dome” shape. That combined with the (offensive to some) orange color probably steered quite a few potential Sirocco wearers from donning this lid. Petzl has managed to drop the “peak” of this lid by one full centimeter. They’ve also changed the design to have a nice taper and removed the “dome” aspect all together.

Petzl 2017 Sirocco Helmet Review
Shape matters
Petzl 2017 Sirocco Helmet Review
Petzl 2013/2017 Sirocco Helmet Shape Comparison

We also now have the option of two colors, white and black! My sources say the white color will not be readily available until late Fall but that black model is available on Backcountry and Amazon along with our local climbing shop International Mountain Equipment!

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To be honest I never minded the 2013 shape or color… but I do like the look of the new model more! There is just a couple other things to mention before we wrap this up…


Worthy of mention is the wider helmet/goggle strap. The 2013 model could easily accommodate ski goggle straps up to about 2 inches in thickness. The new headlamp/goggle strap can accommodate a 3 inch goggle strap.

Petzl 2017 Sirocco Helmet Review
Headlamp/Goggle strap can accommodate

Not a big deal in my opinion because none of the goggles I have ever owned have a strap wider than 2 inches but maybe some out there have goggles with really wide straps? More noticeable is the orientation of the helmet strap is now reversed with the elastic cord latching towards the bottom vs the top like on the 2013 model. This is a small but welcome improvement as I often fumbled with fixing a headlamp or ski goggles on the helmet while I was wearing it, to the point where I usually resorted to just taking my helmet off (adding risk) to attach my goggles or headlamp… this change for the 2017 Petzl Sirocco model allows me to easily add a headlamp or ski goggles without removing my helmet… this is actually important minutiae!

A small update has been made to the innovative magnetic chin strap clip… the magnet can be removed for those who climb in areas with high iron contents. Care needs to be taken that the magnet does not attract too much “magnetized dust” as if it get’s gunked up it can impede its function… With the magnet removed the chin strap functions like a traditional clip.

Petzl 2017 Sirocco Helmet Review
2013 Petzl Sirocco Chin Strap Buckle vs the 2017 model

The thin harness straps are still super adjustable and allow the helmet to fit just about any head shape out there. The small mesh/foam pads inside are still removable for occasional washing… I tend to throw them in the wash once or twice a year to get some of my “grime” out of them…


I’m not sure what more I can say here… I love this helmet. Seriously my only complaint is that Petzl decided to keep the same name. The 2013 Sirocco was great. The 2017 Sirocco is even better and pretty drastically different. Constructed of three materials instead of just one, totally different profile/shape, different ventilation scheme… it just seems like this re-design would have been worthy of a new name, or at-least a (Plus or Two) added to the name similar to the GriGri legacy… which by the way I reviewed in detail the newest Petzl GriGri+ here if you are interested.

Petzl 2017 Sirocco Helmet Review
Petzl 2017 Sirocco Helmet Review

If you are in need of a new climbing helmet or looking to upgrade, might I highly endorse this helmet for you? You can purchase it from the retailers below and doing so will help support my efforts at provided detailed reviews like this for years to come!

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See you in the mountains,

Northeast Alpine Start

Petzl 2017 Sirocco Helmet Review
Author having a great day in the mountains… photo by @alexanderroberts

This item was provided at no cost but the opinions expressed above have not been influenced in any way. Affiliate links help support this blog

16 thoughts on “Gear Review- Petzl 2017 Sirocco Climbing Helmet

  1. And here I had been thinking that the only change was to make it less embarrassing to wear in public!
    (I always try to crop off the top of pictures so as to mitigate its “crystal dome” effect…)

    Seriously though, thanks for the comprehensive review — the extensive redesign is very impressive.
    (And agreed that it really does deserve some sort of model name change or appendage.)

    But Petzl definitely is not the only company whose helmets meet the UIAA standards.
    I can’t find a comprehensive list, but I have come across individual models.

    Now if only Petzl would come up with a variation on the same design that passes the ski certification: higher-level ski mountaineering races now require dual-certification helmets, but the only available models are still relatively heavy (~10oz).

    Liked by 1 person

    • Thanks Jonathan, I made that correction to the copy… Petzl was the first to meet both standards… others have followed suit. Also added some info about the lower back of head coverage (about 2-3cm)


  2. […] Petzl uses three main materials in the construction of the Boreo. The outer shell is a hard plastic ABS shell which both protects the energy absorbing liners and helps dissipate force in a hit. An expanded polypropylene (EPP) liner makes up the bulk of protection around the entire helmet except for the crown (the very top of the helmet) which uses an expanded polystyrene (EPS) liner for added impact protection from a direct top hit. For comparison this EPS liner is about 25% smaller in size than the EPS liner in the award winning Sirocco 2017 model (my review of that model is here). […]


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