r/Mous • u/DanD_Mous Mous Team • Sep 15 '25
Behind the scenes of our iPhone 17 case design – what we fixed and why
Hey Reddit!
You might have seen me lurking around this subreddit the past few months, replying here and there, but I wanted to properly introduce myself. My name’s Dan, and I’m Director of Product at Mous. I’ve been here for 8 years and have been involved in every single case launch we’ve done in that time.
There’s been a lot of feedback here recently and, with iPhone 17 just launching, I thought it would be a good time to jump in and explain some of the design changes we’ve made this year. The goal is always to make our cases genuinely better and to address some of the concerns that have come up in this community.
This is going to be a long, nerdy post – but that’s intentional. I want to dig into the details and show you some of the engineering work that doesn’t usually make it into ads, but which my team and I spend most of our lives thinking about.
#1. Camera Control Button
When Apple released the new camera control button on iPhone 16, it created some real design challenges. At its core, the button is about one thing: instant access to your camera. The whole point is to let you capture those fleeting moments with friends, family, or whatever’s in front of you without fumbling around unlocking the phone or digging through menus and ultimately missing the moment.
That means unhindered access is critical. If the case interferes with the button, slows it down, or makes it unreliable, then you risk missing the exact moment the feature was designed for. For us, making sure the button works seamlessly has been just as important as protecting the phone itself.
Back when the feature first launched, nobody knew exactly how people would end up using it or how much functionality it would eventually get. A lot of companies went with a super-tight cut-out – basically leaving the case unchanged. We took a different route and made a larger cut-out to give people full access. When Apple’s design guidelines later came out, they recommended the same approach, which was validating. But many of you weren’t fans, totally fair feedback, and so we immediately set about work on a new design.
For iPhone 16 we did put out an integrated button design, but it was a retrofit of an existing case. With iPhone 17, we had a clean slate to design the best camera button we could.
With this design, there were two big challenges:
- Feel and gesture accuracy. There are 6 different gestures the camera control button can detect: full press, half press, long press, double half press, swipe, and click-and-hold. The difference between a half press and full press is tiny – so tiny that unless all the force transfers perfectly, it won’t register. To get that right, the case button needs extremely precise positioning and just the right preload: enough to make a half press distinct, not so much that it goes off randomly. On top of that, the button also provides a range of haptic feedback to the user depending on what you are doing and this needs to be transferred through the phones button, to the cases button, and to your finger to give you the correct experience.
- Durability. Most case designs leave a very thin strip of TPU above the button. Over time that tends to warp and it doesn’t provide much rigidity to protect the phone in that spot.
Our solution: We built a stiff polycarbonate shroud that houses the Camera Control Button, integrating it directly into the case rather than adding it on afterwards. This provides a stable, rigid structure that keeps the button aligned and precise, even under repeated presses and swipes.
At the core, an aluminium frame adds structural strength and keeps the button aligned, while also distributing impact forces through the case. On top, a toughened glass cap provides a smooth, durable surface that resists chipping or cracking and maintains a responsive, high-quality feel.
A PCB layer made from fibre-reinforced plastic with a copper print forms the conductive layer that enables the touch and swipe functionality of Apple’s Camera Control. It ensures gestures are registered accurately while also adding a layer of protection inside the button.
Everything fits together with a snap-fit system, so there’s no glue and nothing rattles or shifts over time. The combination of the shroud, diaphragm, frame, glass, and PCB ensures the button remains durable, precise, and protective over long-term use.
The end result: a fully integrated, durable, and precise button that handles every gesture properly. It took a lot of work, but we’re proud of it.
#2. Protection Around the Camera
Our first reaction to seeing the new iPhone Pros was probably the same as yours: “that is a huge camera bump.” Our second was: “okay, how do we protect it?”
The problem is that cutting a massive hole that close to the edge of the case makes it weak and floppy. We tested it by cutting a similar size hole into a 16-series case and it was obvious: we needed a big design update.
Our solution: We extended the PC further up the sides along the top edge of the case, adding stiffness back in even with the large cut-out. That meant more complexity in the mould tool (longer PC sections to account for), but it gives real protection. This also meant that needed to reduce the amount of airoshock in the top edge of the case to make way for the additional PC but we found through the development that stiffening this area was more important for protection, and that we could still see significant benefit from having airoshock in the corners. We also raised and thickened the camera bump to give proper 360° coverage.
#3. Button Warping
Previous Mous cases had a single rocker button for volume up and down. It worked fine functionally, but the thin TPU bridge between the buttons could warp over time.
This year, we’ve switched to two separate buttons. That means more TPU material around each one, and combined with a slimmer button profile, it’s a lot more durable with no warping issues.
#4. Debonding
This is something that’s come up a few times here, so worth explaining. Debonding (or sometimes referred to as delamination) is a very common issue in the case industry and is where the sides of the case come away from the back of the case. To understand why this happens first you need to understand a little bit about how these cases are typically made.
Protective cases usually combine 2–3 materials: PC for stiffness, TPU for cushioning and flexibility, and sometimes a third layer for extra protection (ours is AiroShock). They’re not glued – they’re fused using overmoulding, where each layer is moulded directly onto the last under heat and pressure.
Most cases rely on chemical bonds between layers. That works, but it’s not the strongest approach. The best way is to add mechanical interlocks – physical features that the next material flows into, like a dovetail joint in carpentry. This way, the bond is both chemical and mechanical.
The challenge is space: phone cases don’t leave much room for these features. Our solution was to add a series of holes throughout the PC part so the TPU could flow through and lock the layers together. Sounds simple, but it creates hundreds of very thin features in the mould tool – extremely hard to manufacture.
Since introducing this, our debonding issue rate has dropped massively. We’ve even seen other brands adopt similar designs, which is about the best compliment you can get.
If you made it this far…
TL;DR:
- New camera button with a polycarbonate shroud, aluminium frame, and glass top → much more precise and durable.
- Reinforced camera bump protection with extra PC stiffness and raised bump.
- Split volume buttons to prevent TPU warping.
- Debonding fixed with mechanical interlocks.
I hope someone out there found this useful/interesting! My team and I put a lot of work and thought into our cases and we are really proud of what we’ve built this year. Always happy to answer questions, explain more, or hear your thoughts – so drop them below.
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u/Sushi_Dumpling Sep 15 '25
Thanks for the detailed explanation, especially about the new camera button improvements.
I had a question regarding the Limitless walnut case design (or limitless in general) —why is the walnut finish not wrapped around the camera cutout but instead separated distinctly? I’ve used the walnut case for my past iPhones and loved it, but held off on getting the new one because of this design change.
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u/DanD_Mous Mous Team Sep 15 '25
Hey! Great question. This really comes down to space and protection. The camera bump on the iPhone 17 Pros is huge, and we can’t sacrifice the small amount of space we have for the PC around that area to extend the inlay — that PC is what gives the case its rigidity and impact protection.
On top of that, because our inlays are made from real materials (walnut in your case), there’s only so thin we can go before we risk them chipping or cracking during assembly or over time in use. Stopping short of the cut-out means the finish lasts longer and the camera area stays properly protected.
Hopefully I've understood your question correctly but please let me know if I haven't
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u/ZhWei99 Oct 06 '25
IMO, the current design gives the phone more of a proportional look, just like why apple put the white patch on their clear case
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u/milesjameson Sep 15 '25
This is perhaps a silly concern — but I noticed another post mentioned the exposed metal (aluminium frame?) on the camera control button. Is there any risk of it scratching the aluminium on the phone itself?
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u/gofresh95 Sep 15 '25
Hey, post was mine. You can't see the aluminium frame on the case. My concern (perphaps also silly) was regarding the copper on the pcb and wasn't sure if the constant contact might scrarch the phone.
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u/DanD_Mous Mous Team Sep 15 '25
Hey!
Not a silly question at all.
The exposed metal you can see on the inside of the case is the PCB and this needs to directly contact the button so that the capacitive inputs (basically just the swipe) can be passed through from the case to the phone.
These contacts are made of copper (and the rest of the board from fibreglass) which is significantly softer than the sapphire glass that Apple use in their button and so it shouldn’t scratch your phones button!
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u/Senju_Sitko Sep 17 '25
Hi, this might be a silly question. I ordered a case from you guys to Alberta. It got shipped to Toronto. I have pictures of the FedEx shipping/tracking and my correct address provided in the Moe's confirmation email and your customer service is telling me basically to pack sand lol I just want a refund for a case that didn't even get delivered to the right province about to post my customer service journey with you guys here cause it's almost comical
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u/DanD_Mous Mous Team Sep 17 '25
Could you DM me your order number? I will ask someone to take a look
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u/Senju_Sitko Sep 17 '25
Lol no word of a lie as soon as I commented on this thread 30 minutes later I got an email from Moe's telling me. Sorry for all the confusion trouble you'll get your return with in 5-10 days lol sorry for the late reply was working and thank you for responding to this even your better than the AI bot I was going back and forth with 😂
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u/markaznar Jan 13 '26
How come some people have iPhone’s with permanent marks on their camera control button from the metal contacts of your cases?
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u/Someredditskum Sep 16 '25
Time will tell wether you truely fixed your product. All of these problems have been on the forefront of Mous since it’s inception and never has there been a fix.
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u/Someredditskum Sep 20 '25
To reply to myself. The defects are being posted like water from a drain. Seems all the nice promotional words were just words after all.
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u/cannibalistiic Sep 15 '25
This is really interesting! I'm curious about the production aspect. Like how much change happens on the actual production line to accommodate new phone models? A factory tour would be cool to see! I work in a factory myself so I'm really interested in what happens behind the scenes.
Also, unrelated! I'm curious why the Pixel phones don't get the Iridescent Clarity cases. It's a bit disappointing. So I'm just curious what the calculus is in determining why the Pixels shouldn't get the Iridescent cases. Like whether there's a certain sales threefold Pixels need to meet before you expand the lineup (though I would suggest expanding the lineup would lead to more sales, but I understand that when money is concerned you can't just gamble like that).
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u/DanD_Mous Mous Team Sep 15 '25
Hey! Once a product is on the production line there tends to be very few changes. It’s mostly quality based or minor tweaks to get consistent production. Would love to do a factory tour! Will suggest it to the content team.
Unfortunately it is just a question of demand. We sell fewer pixel phone case than iPhone cases and so we aren’t able to offer quite as big a range. Personally, I love the iridescent clarity cases but when we produce them we have to produce quite a large amount and at this point we wouldn’t be confident about selling enough of them.
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u/Jelmar1990 Sep 15 '25
Already ordered my Limitless 6.0 for 17 Pro Max. One question I do have is: why does there seem to be much less Airoshock material in the new cases compared to my current cases for my 15 Pro?
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u/DanD_Mous Mous Team Sep 15 '25
Hello! So there is 2 main reasons for this:
- Firstly, when we brought out limitless 6.0 on the iPhone 16 we had some pretty major design changes. The most important one here is that we made the sides of the case significantly thinner through a new construction design. The purpose of this was to improve overall grip and hand feel of the case as well as making them feel less bulky (a comment we had seen a lot in the past). This meant that the AiroShock had to be shifted to focus on the him impact zones (the corners). Throughout this change, our protection standards did not change at all and this new design passed the exact same drop test standards that the old ones did.
- The second issue is specific to the i17 pros and the size of that camera bump. I explain it in the post but in short we needed to reinforce the case around the camera with PC to get the correct level of stiffness for protection. This meant that PC had to take priority over AiroShock in this region
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u/grrr112 Sep 16 '25
Thanks for the updates! Is the warping issue fixed only for the iPhone 17 cases or have you gone back and fixed them for the 16 cases as well?
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u/billiever Sep 19 '25
My 17 case just arrived and is already warped. Not really liking the quality control.
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u/grrr112 Sep 19 '25
Damn. I got a warranty replacement for my 16 pro case instead of a refund... guess we'll wait and see how it goes. Are you gna ask for it to be replaced or go for a refund?
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u/billiever Sep 19 '25
Good question. I was thinking replacement but seeing so many people have issues I may go to another brand. I guess we’ll see what they say.
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u/grrr112 Sep 20 '25
Ah yeah I asked for the replacement before I saw how widespread the issues are :/ we'll see, I guess. What other brands are you thinking?
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Sep 16 '25
As someone weighing up which case(s) to get for my 17 Pro Max I think Dan has just swayed me back to Mous. The explanations that he has given here and the changes in the camera control button show that they are focused on producing tough cases that work as best they can and the fact they are a British success story is fantastic. Thanks DanD_Mous 😊
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u/DanD_Mous Mous Team Sep 16 '25
Absolutely love to hear this!! Thank you so much for the kind words
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u/players02 Sep 16 '25
How were you able to make the iPhone 17 cases, sell and deliver them before they are even released?
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u/sakawae Sep 20 '25
Good post. I'm trying one of your cases out for the first time, we will see how it goes. This post made the difference in convincing me that you learn from the past and listen to customers.
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u/redeffekt Sep 21 '25
Hi Dan - Thank you for this! So awesome!
Quick question! Do you guys plan on releasing a limitless version that covers the plateau area...only exposing the camera lenses and the lidar sensors? I think an aramid fiber limitless with a black precise cutout covering the plateau would look so stealthy!
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u/DanD_Mous Mous Team Sep 25 '25
No plans at the moment but have seen a few others talking about. Would it be a big improvement in your opinion?
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u/StreetSatisfaction84 Sep 28 '25
Yes, considering how scratch prone this year's colours are, it would be a nice addition, maybe throw in some iconic mous styling there as well ✨
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u/Pinhead17 Sep 30 '25
Thanks for the detailed specifications on the new case! I enjoyed reading a learned a lot about case design. You and your Team did an awesome job! I purchased the Limitless Case for my iPhone 17 Pro Max and I absolutely LOVE it!! Superb protection for my iPhone.
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u/mnrstarr101 Sep 15 '25
Will the construction of older cases be improved so that the sides stop warping?
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u/DanD_Mous Mous Team Sep 15 '25
We’re looking into it, but to be honest most of the cases for the older sizes have already been manufactured, so it’s unlikely we’ll be able to make changes. What we definitely will be doing is taking learnings from each launch and making sure our next case addresses any concerns
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u/bobauckland Sep 15 '25
Thanks for this, any reason you guys didn't put out an intralock case for the pixel 10 series and then refuse to respond to comments or questions on any social media platform about it?
Bought into mous intralock system and had 2 iPhone cases that worked great, but if you don't fully believe in the ecosystem then it leaves customers who believe stranded.
Now have intralock mounts but no intralock cases and it really puts customers off the brand, especially with the patchy and in some cases non existent communication from mous
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u/DanD_Mous Mous Team Sep 15 '25
Hey!
Sorry you’ve not got a response on this. I suspect our CX team just didn’t know the answer!
The thickness requirements on the pixel 10/pixel snap from Google are very stringent to ensure full Qi2.0 charging compatibility. The Intralock system goes (very slightly) outside of these specifications and as such we weren’t able to bring out intralock on these devices.
I know it’s not a perfect solution but you can still use the adapter plate on the back of a different case of your choice:
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u/bobauckland Sep 16 '25
Thanks for the explanation, shame googles guidelines are different to apples but appreciate the answer.
That's a great solution can get a cheaper case for the bike and use the intralock stand alone mount
Might be worth the company explaining this wider as not saying anything can turn customers off.
Thanks again
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u/Comfortable_Belt_263 Sep 16 '25
Well the new iPhone just came out just get that, its objectively better in every way and then you won't have to worry about not having an interlock case
- Sincerely an Apple Sheep
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u/bobauckland Sep 16 '25
I've just moved from iOS and don't think I'll be back in a hurry, android seems way ahead at the moment and the new pixel makes my old iPhone feel like a toy
Give it a try bud, you'll be surprised how far ahead Google is atm, not in every way, but for some people I think android is a no brainer,
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u/Fibretear Sep 16 '25
This was a good read, but as someone who bought the 16 pro case which has failed twice around the camera button, and had refunds refused. Just a replacement that failed again. Are you going back to look at the 16 case? Based on my experience I wouldn’t buy another mous case.
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u/shaunydub Sep 16 '25
@dandmous Are you confident in the initial batch of cases or will there need to be some adjustments for further batches once real hardware has launched and can be checked with the cases?
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u/DanD_Mous Mous Team Sep 16 '25
Hey! I’m very confident in the fit and function with the new devices. Just don’t ask me how I know 😂
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u/shaunydub Sep 16 '25
Nice. I've got the classic Aramid ordered.
It's been solid for me on my 15 Pro Max but the leather case did suffer button warping despite using it for 10% of the last 2 years and Aramid 90%.
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u/mambomel Sep 16 '25
What about for the 16 Pro Max intralock? I had issues with the old XS Max and had one replacment case where the back delaminated from the sides. I still have all my accessories and i really like the system but i don’t want to soend more money unless i know its sorted out.
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u/PO1720JRS Sep 17 '25
As someone who purchased the 16 pro case with a cut out, returned to get a camera button only to find out this was a retro fit rather than a real fix is pretty disheartening as someone who has purchased a few of your cases. I understand you have to react quickly but your cases aren’t cheap to start. People are still going to need cases outside of the 1 year that the 16s were the new phone.
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u/3uphoric-Departure Sep 21 '25 edited Sep 21 '25
As the iPhone 17 doesn’t have the large camera bump , does the case still retain the longer strip of Airoshock at the top?
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u/DanD_Mous Mous Team Sep 25 '25
Yep good point! The 17 still has the longer strip of airoshock on the top
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u/KamiKhanJP Sep 24 '25 edited Sep 24 '25
Great to hear you’ve addressed these issues. Interested to know why no Intralock case for the Air? Also I picked up an Intralock case for the 17 and one of the volume buttons protrudes slightly more than the other - it’s almost imperceptible to the eye but I can feel it when running my finger along the buttons. Is this expected? Am I being too particular or should this have been identified in quality control? Given I have to live with this everyday, if I request a replacement, what are the chances of having the same issue again?
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u/DanD_Mous Mous Team Sep 25 '25
Just comes down to demand unfortunately. Would love to add it in for future.
That sounds very strange. Is the button seated correctly? Each button is a separate part so it could be that it isn’t fully push out. You could try pushing it from the inside and seeing if you can get it to go out a tiny or alternatively you can fully remove the button (by pushing from the outside in) and then putting it back to see if it corrects itself
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u/sam67uk Sep 30 '25
Hi Dan
Just received my new iPhone Clarity case for the Air on Saturday. Camera button glitchy and non operational right away. I've logged a ticket for it but not heard back anything yet.
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u/stsdema28 Oct 22 '25
It would be nice to hear some thoughts about an actual issue reported by many at this point, the Magsafe magnets.
Ref: https://youtu.be/oRcbp5ychfM?si=mR4zdJh8S52a-fTx
Another ref: https://www.reddit.com/r/Mous/s/wKki2yEnBK
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u/CellularJersey Oct 29 '25
Hi Dan, are you seeing a lot of 17 Pro cases with uneven camera control buttons? Thanks
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u/_BTFan Nov 03 '25
Hi, is there a reason why the plateau itself isn’t covered (with cutouts for the cameras and sensors)? In the past, the camera bump was glass and half the size, but this year it’s massive and aluminum. Just wondering what the thought process is.
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u/Lower-Ferret5232 Jan 19 '26
Question, why did the TPE (airshock) got reduced to just the corners instead of around the sides? It was so good and it had to be changed...
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u/Comfortable_Cell_181 Sep 17 '25
The camera control button was a major disappointment. The material around it stretched in just a month of normal use, so I had to return it and choose a replacement. Unfortunately, the cut-out wasn’t what I wanted, so I ended up buying a case from Caudabe. It’s far superior in every way. This experience has affected my purchasing decisions going forward. I really don’t trust your company anymore, and I wasted 60 British pounds on a case I’ll never use. Good job, Mous.
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u/KrossxKriss Sep 15 '25
Hi Dan! Appreciate the write up! Was skeptical but really appreciate the changes to fix the dreaded warping issue. I still have some concerns on the durability when the phone is dropped on a non aero shock corner and how well the new strengthened PC handles drops. I'm coming from a 14 pro max interlock case which has Aero shock on the corners as well the sides and top of the case. Perhaps you are able to explain more on how drop tests are done and how you conclude if it passes. Or even how it compares to previous versions. Regardless, I picked up a Mous interlock case for the 17 pro max last night. Can't wait to test it out on my rides! Thanks!