When On Running first released the Cloudstratus a few years ago, I knew it was going to be a game changer for long distance runs. I’ve a lot of experience running with On running shoes that use Helion foam in their midsoles but no other On shoe has Helion in two layers – and that’s what makes the On Cloudstratus shoe so special. Interested in getting up to 40% OFF On running shoes? Visit On’s Classic range page to see their latest deals.
This in-depth On Cloudstratus review focuses on the key features of these marathon running shoes, how well they perform while running, and how well they rank against other On running shoes in our Best On Running Shoe Reviews Buyer’s Guide.
The concept of stacking two layers of CloudTec® Helion foam started as a bit of an experiment in the On engineering lab in Switzerland but ended up becoming a serious hit with marathon runners who realized the benefit of having a super cushioned shoe with high energy return due to the speedboard that sits above the midsole and below the footbed.
The On Cloustratus is very much a marathon and half-marathon running shoe that has more cushioning than many of On’s other shoes (except for maybe the On Cloudace), while keeping much of its responsiveness.
It will suit heavier runners with wider than average feet. On has also made a commitment to be a more sustainable company, and as such the Cloudstratus features a new upper which is constructed with 75% recycled polyester – more on that in just a moment.
Hopefully, this On Cloudflow review answers all the questions that you may have but if not, please feel free to ask me anything in the comments section down below, I usually respond within a few hours – or for a faster reply, ask me on Instagram.
On Cloudstratus Sizing and Fit
The On Cloudstratus is very comfortable right out of the box, which is something I have come to expect from the On brand.
Much of this comfort comes from the inner sock that’s attached to the sides of the tongue, which wraps around the foot really nicely, reducing the likelihood of any chaffing.
Other features that give it comfort right out the box is the dual CloudTec midsole which provides cushioning underfoot and the soft thick shoe wall which rests around the top of your ankle.
The On Cloudstratus running shoes fit true to size relative to other On shoes and other popular brands like HOKA, Nike, Adidas, and Brooks Running for example, so there’s no need to size up or down, just go with the size that you’re used to.
If you have wide feet then these should fit you nicely too, as there’s a good amount of room in the toe box area.
The On Cloudstratus Upper Construction
The On Cloudstratus upper has a nice anatomical fit that allows for better flex as you run, relative to the biomechanics of your feet.
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As I mentioned earlier, On is becoming one of the most sustainable running shoe and apparel brands which means they are fully committed to reducing waste and helping to protect our environment as a result.
Their latest running shoe releases demonstrate this with increased use of recycled materials in their construction. On is also using fully recycled packaging now too in order to further reduce their footprint, which is awesome to see.
With that said the Cloudstratus is using 75% recycled polyester in their upper material, and about 20% of the shoe as a whole, uses recycled materials – that’s 2x more than the previous model.
The most breathable parts of the upper are located on the mid-section sidewalls and above the toe-box – and the materials get thicker towards the rear for more cushioning and support in the tongue, heel and ankle areas (see image below).
Looking towards the rear of the shoe, you’ll notice a solid plastic heel cage which is designed to lock your heel in place and reduce the chances of lateral foot roll (see image below).
This gives a good stable-feel while running longer distances.
Once again, On has gone with the same forefoot star formation lacing system which I’m still not a fan of.
According to On, it exists to help improve the fit and also to support your foot’s natural motion in the areas where it flexes, but personally I haven’t really noticed this and prefer On’s standard lacing system.
The star formation towards the forefoot makes doing up the laces for the first time a longer process than it needs to be.
It’s better than the previous model in that the upper doesn’t get pulled when you tighten the laces in that area but I’d still prefer to see a more standard lacing setup on the Cloudstratus.
The Double Layered Helion Midsole and the On Speedboard
The latest double-layered Helion CloudTec midsole on the 2nd Gen Cloudstratus offers even more cushioning than the previous model with the dual-layer extending right to the front tip of the shoes.
The dual-layer stopped before the forefoot on the previous model, which was something that I noted On needed to improve on.
I’m pleased to say they have, and the new design works really well, as expected.
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If you’re completely unfamiliar with the Cloudstratus model and it’s outsole design, On has effectively sandwiched two cloud layers into one, giving the shoe a super cushioned ride, without that plushy feel which can take away all responsiveness from a running shoe.
The doubled-up midsole does add a little extra weight to the shoe putting it at 11.1oz (or 315g) which is 10 grams heavier than the previous Cloudstratus, even though it doesn’t feel heavier.
This weight is to be expected for a running shoe with so much cushioning in the midsole and in the upper’s heel wall.
On’s Speedboard combined with this midsole make the Cloudstratus a very cushioned shoe with a responsiveness that you may not expect from such a comfortable shoe.
On’s speedboards allow you to run faster than you may be used to because they act as a propulsion plate that springs back into place after it has been flexed by your feet.
The Cloudstratus outsole has been greatly improved over the previous model with multi directional tread that will give you plenty of traction when running on the roads in wet and dry conditions.
You’ll also notice a valley carved out towards the rear which reduces the weight of the shoe – On has also spaced the clouds out a bit more too.
Cloudstratus weight and drop
As mentioned earlier, the On Cloudstratus weighs 11.1oz (or 315g) due to the dual layer cushioned midsole.
There’s a drop of 9mm from heel to toe which is 1mm higher than the previous model, it has the same ride feel, however.
I really like the ride of the Cloudstratus with this level of drop but I think it could be improved a bit if On could shave just a little bit of weight off the running shoe.
The On Cloudstratus has a neutral running footbed which means it’s going to suit most people who have an average foot shape.
If you do feel you need extra arch support then I would recommend getting yourself a pair of good running insoles to help improve comfort and running form for those who need the extra support underfoot.
Toe Box
The toe box is wide and feels airy due to the breathable upper material.
Where to buy
The On Cloudstratus is available for purchase at on.com for $169.99.
On Cloudstratus Review Summary
In summary, the On Cloudstratus is a marathon and half-marathon running shoe designed for heavier runners who want to soften the impact while running long distances on the roads and the toe box is nice and wide with good ventilation for temperature regulation.
It’s also a very supportive shoe that has a heel cage to help lock your foot into the shoe.
This is a long-distance performance shoe which carries a little more weight than some of On’s other shoes due to the dual layer Cloudtec midsole and cushioned heel wall.
If you are a heavier runner, the weight of the Cloudstratus shouldn’t really be that noticeable to you, and that dual-layer cushioned midsole will be your friend for many many miles.
I hope you enjoyed this On Cloudstratus review, if you have a question for me, please leave it in the comments below.
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In your opinion, what is the difference between cloudstratus and cloudace?
I used cloudflyer and bought cloudstraus looking for some speed, but I feel like I’ve lost comfort (I agree about the rare feeling landing vs forefoot). Could the same thing happen to me with cloudace?
I personally feel like the Cloudace is more comfortable, especially in the forefoot. This makes it a good shoe for marathon running. Have you tried the Cloudsurfer? It is very cushioned too and gives a great ride.
-Alastair
I run with cloudsurfer too and I have good fellings, but the clousds are very fragile (they broke at 500 kms) and sometimes I need more cushioning.
Thank you for your opinion, I think cloudace are half cloudflyer (for landing) and half cloudsurfer in the forefoot, so I have to try running with them.
Alberto.
I personally feel like the Cloudace is more comfortable, especially in the forefoot. This makes it a good shoe for marathon running. Have you tried the Cloudsurfer? It is very cushioned too and gives a great ride.
-Alastair
Any recommendations for breaking in Cloudace? I love that shoe, but after 100 miles had to stop wearing because area around ankles is so stiff, it hurts just to walk around in them. Why I switched to cloudstratus, no ankle discomfort with those, but do like Cloudace better, ankle pain aside
Hmm, that’s a good question. The only way I know how is to run in them more. But if they’re beginning to give you pain around your ankles then stop wearing them. Alternatively, give the Cloudace a longer break and try them again in a few weeks time when you’re ankle is ready for another go.
Try Cloudboom Echo, its expensive but you will love it.
I am looking into switching to On shoes from Saucony or at least adding a pair into my rotation. I have a pretty sensitive Achilles. In your opinion, do you think the back of this shoe rubs against it or could potentially be bothersome?
I feel your pain Mario, having gone through achilles tendonitis before! I’d say the Cloudswift has the softest heel wall in the On-Running lineup… The Cloudstratus (https://www.trailandkale.com/gear/on-cloudswift-review/) is a heavier shoe and if you suffer from a sore achilles then maybe avoid it and try the Cloudstratus instead. Cloud X is very good too, and shouldn’t agitate your Achilles.
-Alastair
Im a nurse and wear the cloudstratus for my 12.5 hour 14,000+steps. That’s a marathon in my book.
C’stratus are easily the most comfortable shoes I’ve ever had for work. Needless to say ‘trainers’ do not suit the corporate image the NHS wants to portray but luckily Occy Health supports staff who wear shoes for working not show
The wide toe box is so comfortable. Why don’t more shoes have the wide toe box. It’s normal human anatomy, isn’t it.
Hey Sally,
I hear from so many people that On’s are a very popular choice for nurses on their feet all day. It’s usually the On Cloud that they tend to tell me they enjoy using due to the light weight. So glad you’re enjoying your On’s too 🙂
-Alastair
I have a new pair of Cloudstratus shoes and broke one shoestring. I went back to where I bought them to buy replacement strings but they don’t carry them. Where do I find them.
Have you tried contacting On directly via their website? I’m sure they will be able to help you there. Curious, where did the lace break? I’ve never heard of that happening before.
Hi, I have Cloudace size 10.5 (UK). I’m considering swapping to the Stratus. You mention about the Stratus being a wider fit, in view of this would you be able to say if you used a smaller size for your review or did you use the same size as your other On shoes? I’d just like to add how helpful the customer service team (happiness deliverers) are from On. Regards, Alan.
Hey Alan,
The Cloudstratus has a wide toebox relative to other On’s in general. The length sizing however is consistent with other On’s.
Best,
Alastair
Hi , do you know if the cloudstratus is a neutral shoe as i can find nothing on their website to indicate. im getting custom made orthotics and need a neutral shoe, thanks
Hi Elizabeth,
Yes, the Cloudstratus is pretty neutral in terms of the footbed, and there’s a neutral/minimal arch.
Thanks so much for the reviews you’ve done.
I bought my first pair of on cloud x shoes for walking last year and they were so good I started running. I’ve lost a heap of weight and feel great. It’s time to replace the awesome cloud x shoes but I’m still 100kg and my legs do hurt after runs so I’m wondering if there is a alternative model I should use? I loved the whole foot snugness, simplicity and feeling of the cloud x model.
Hey Michael, You’re welcome – it’s kind of a dream job for me haha 🙂
Congratulations on your weight-loss journey to a healthier, happier you! It makes me so happy hearing these stories, especially when a Brand like On running can help inspire the change!
You’re right about the Cloud X, they are really awesome shoes, have you tried the latest Cloud X? There’s a little bit more cushioning in them now. Regarding a different On Running shoe, that’s not too dissimilar in feel to the Cloud X but offers extra cushioning and bounce underfoot – have a look at the Cloudsurfers. They are better for running specifically (as opposed to a daily lifestyle shoe hybrid) due to the different pod design than on the Cloud X but they do give a really awesome bouncy feel while running! A fun shoe for sure!
-Alastair
Thanks for the advice Alastair. I ended up trying the new CloudX but my foot swam about in them and I got serious blisters – they no longer had that awesome snugness. I was very disappointed. On Running came to the rescue and gave me a free new pair of the old versions. Apparently the sizes were changed to better suit the cross-training role of the CloudX. I’ve almost killed these new ones so I’ll try the Cloudsurfers now.
Are you sure they are heavier? I read on other reviews that the Version 2 was lighter..
Hi Bruno,
I haven’t specifically weighed this version as I don’t have a scale where I live right now but according to my contact at On Running – they are heavier than the previous version that I reviewed a few years ago – and the drop is now 1mm higher – I think the website stats may be incorrect. Stay tuned as I look into this!
-Alastair
Does the Cloudflyer have more support than the Cloudstratus?
Hi Clayton,
I’d say the new Cloudstratus (Aug 2021) has better support than the Cloudflyer – it’s a batter design around the heel and underfoot.
Cloudflyer vs. Cloudstratus
I’m particularly looking for a wider toe box, not a wide shoe. I have back issues and use these just for everyday wear and walking. I need the cushioning, but with a wide toe box. Which do you know has a wider toe box, without giving up the cushioning. Yes, I want it all! LOL!!
Hi Tonya,
These two shoes have a similar toe box but I’d definitely recommend the Cloudstratus over the Cloudflyer. It’s a lighter, more flexible shoe that feels a lot more comfortable when worn for long periods. Here’s an article I wrote that sums up every On running shoe and the order in which I rate them: https://www.trailandkale.com/gear/best-on-running-shoes-reviewed/
-A
Hi Alastair, Im ready through these comments and your knowing of on running is amazing. I have been using on running for about 4 years now and do my research but im still not sure shoe is the best fit for me. I mostly running on a treadmill and my feet roll outwards (supinate) which on cloud shoe do you think would best suited for me?
I tried the Cloudstratus for 20 minutes and it gave me plantar fasciitis in the left foot! The feeling at first was like having a firm ball under my arch. Should I return them and get the Cloudsurfer instead? Or it can happens and with a bit of breakin these shoes will be great?
Hi Jeff, no amount of breaking in will ease that pressure you may be feeling on your arch; I would try and see if you can return them and try the Cloudsurfer (it’s a better shoe). Here’s my review of that one: https://www.trailandkale.com/gear/on-cloudsurfer-review/ – Let me know if you have any other On questions; you may also find this On running shoe buyer’s guide helpful: https://www.trailandkale.com/gear/best-on-running-shoes-reviewed/
-Alastair
If replaced the CS 2.0 insole with PowerStep. Worked well until right shoe heal started squeaking. Bad glue?
Yeah that squeak is probably the insole moving inside…
Isn’t squeaking anymore. Knock on wood!
Love these shoes!
Best!
Excellent! Did you stick them down more?
Hi Alastair,
Would you say the latest Cloudstratus 3 is worth the upgrade from Cloudstratus previous?
I bought a pair (before seeing your review) because I like the idea of the 2 layers and the bouncy feel. How does it compare with the Cloudflyer? I bought both! and even considering the Cloudmonster as that was your pick as the best. Only the Stratus and the original were available for me try on in store. But I was recommended the Cloudflyer 4.
I got carried away with all the choices of Cloud shoes and opted for something I thought was superior to the original “basic” Cloud 5. Now I regret it because I’m not really a runner, and will probably use them for walking, standing long periods, and also everyday. So I’ve kind of “wasted” its superior qualities that serious runners would need? so I’m definitely having regrets now. I also have very flat and narrow feet. I’ve been wearing Asics Kayonos as I love that cushiness, but was really fascinated with completely new structure.
Any comments are really appreciated.
Mary
Hi Mary, the Cloudstratus is much better than the Cloudflyer in my opinion – it’s much more comfortable and bouncier. Here’s a list of my favorite On Clouds for running with, it should help you narrow down the right pair for you: https://www.trailandkale.com/gear/best-on-running-shoes-reviewed/
The Cloud 5 is an awesome shoe for the everyday, and as a general lifestyle shoe – it’s what I choose to wear, but not for running. Here’s my list of the top On Cloud shoes for standing/walking all day: https://www.trailandkale.com/gear/best-on-cloud-shoes-for-walking/
Hopefully that answers your questions but please let me know if you need anything else.
-A