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Description
cybex rear facing CYBEX Sirona S Convertible Car Seat | Infant SeatThe Cybex Sirona S 360 is the ONLY convertible car seat to feature a 360 rotatable seat with load leg stability, linear side impact protection, and SensorSafe technology. This Sirona S 360 rotating convertible car seat is the first model to include an innovative 360 rotatable seat with load leg technology, making switching between rear facing and forward facing positions quick and easy. The Sirona S car seat's load leg stabilizes the seat and can
The Cybex Sirona S 360 is the ONLY convertible car seat to feature a 360-rotatable seat with load leg stability, linear side impact protection, and SensorSafe technology.
This Sirona S 360 rotating convertible car seat is the first model to include an innovative 360° rotatable seat with load leg technology, making switching between rear-facing and forward-facing positions quick and easy.
The Sirona S car seat's load leg stabilizes the seat and can significantly reduce crash forces. These features, combined with an EasyLock bar for quick, simple, and secure installation, offer advanced safety protection for children — and greater peace of mind for parents.
SensorSafe™
The smart-tech harness chest clip with SensorSafe™ technology makes the Sirona S SensorSafe convertible seat even safer, providing alerts when unsafe situations arise — including if a child unbuckles themselves while the vehicle is in motion, if the back seat has become too warm or too cold, if a child has been seated for too long, or if the driver accidentally leaves the child behind after the vehicle has been switched off. These alerts are provided through an installed vehicle receiver and the user-friendly smartphone SensorSafe App.
Product Features :
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An innovative, one-hand 360° rotatable seat allows parents to easily get their child in and out — a signature feature of the Cybex Sirona S 360
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The load leg stabilizes the car seat and can reduce rotation in certain crashes by up to 30%
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The only convertible car seat in North America with a one-time vehicle belt installation for both rear-facing and forward-facing modes
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EasyLock bar reduces the force needed up to 4x for quick, simple, and secure installation
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A smart-tech harness chest clip with SensorSafe technology alerts parents if their child becomes unbuckled, the car temp gets too warm, or unsafe conditions arise
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12-position recline adjustment, even while the seat is in use
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Linear Side-impact Protection absorbs up to 25% more impact in a collision, making the Cybex Sirona S 360 one of the safest convertible car seats
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An anti-rebound design reduces car seat rebound movement
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Magnetic buckle holders make entry and exit from the seat a breeze
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A dishwasher-safe cup holder can be positioned on either side of the seat
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12-position, height-adjustable headrest with no-rethread harness
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Dual-level indicators help ensure the proper car seat angle
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A steel-reinforced frame provides strength and durability
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Harness pads and a 3-position padded buckle provide extra comfort
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Removable newborn insert provides support for small babies
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Innovative one-pull LATCH removal system
- LATCH Connection storage inside the base when not in use
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Rear-facing from 4 lbs. to 50 lbs. Forward-facing from 22 lbs. to 65 lbs. — making the Cybex Sirona S 360 a safe choice as your child grows (when compared to the same car seat without L.S.P. extended)
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SensorSafe is compatible with most vehicles 2008 or newer with an OBD II port. For some electric vehicles, contact Cybex as an additional adapter may be needed
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Measurements of the Sirona S 360 rotating convertible car seat: Forward-facing (Fully upright) 25.5” H x 20” W x 25.3” D Weight: 30.4 lbs.
- Use from birth up to 65 lbs. or 49 inches, following the directions in your user manual
Product Details :
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Group: Convertible Car Seat
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Height: max. 49 in
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Weight: From 4 lbs. up to 65 lbs.
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Age: From newborn to approx. 4 years
- 2-year limited manufacturer's warranty
- Care: Fabrics machine washable cold, delicate cycle, with a mild detergent.
Functions :
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SensorSafe™ Technology
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12-Position Recline
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Linear Side Impact Protection (L.S.P.)
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Anti-Rebound Design
- Magnetic Buckle Holders
Upgrade to the Cybex Sirona S 360 today and experience the Sirona S car seat advantage for unmatched safety and convenience! Order now at Kido Bébé!
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 16 reviews
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Product Reviews
★★★★★ 5
I wish I had Siless 20 years ago!!!
Model: SLH20025, Model: SLH20025
I have installed all kinds of insulation in vehicles over many years. I only needed to purchase 2 boxes to complete the entire interior siding of my 2025 chevy express, what a great value! I wanted to insulate my locksmith van for sound and heat. The sound reduction virtually eliminated the road noise. These panels also look amazing. It got up to 110F in the sun with the doors closed. After adding Siless insulation the temperature maxed out at 97F. That is a massive difference. Plus, I didn't even finish with the roof before testing. Siless Hybrid 3in1 was extremely easy to cut and adhere onto metal panels. I'm impressed with the quality of the individual panels and the adhesive is not toxic smelling compared to some others. My favorite thing about these panels is you can actually take them off and readjust them before they finally stick and they do not leave any black residue behind when you pull them up to adjust them. All I needed was a heat gun, knife and a roller to complete this job. The size of each panel is perfect, you can handle them with ease. I probably won't need your product again for a while, but when I do I will definitely be back.
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Reviewed in the United States on September 21, 2025
★★★★★ 5
Works well and is easy to install.
Model: SLH20025, Model: SLH20025
I was sound and heat insulating a generator bay in my class A RV so I did three tests before and during material application: I did a sound level test to see how effective the material was for my application, a "stickiness" test, and a flammability test. This was indoors on a dry 78°F day. From beginning to end, the entire process, including testing, took 5 hours to install 25 sqft or material in a very complex area. One hour for cleaning, 3 hours for installation, and 1 hour for test setup and testing.
Using a sound meter, I took before and after readings and determined that I reduced the sound level by 2.2 db (40% energy decrease) with a noticeable decrease in sound and frequency. The generator bay is located under the master bedroom in the aft portion of the coach. The sound went from a rattling, vibrating generator noise to a more tolerable low level rumble.
The material was easy to apply. I did some testing prior to application and determined that surface preparation is key. I cleaned my painted metal surface and then degreased with acetone and the material stuck well. Be careful and purposeful when you apply the material because once it was stuck to the metal, it was quite difficult to remove or reposition.
Since it was going to be installed into a gasoline powered generator bay located under our sleeping quarters, I did some flame testing to determine the level of risk. Although not highly flammable after installation, my testing revealed that the PE used will catch on fire under certain circumstances. In order to reduce the risk, I used aluminized duct tape to ensure that all the edges were sealed and the PE was not exposed to direct flame in the event of a fire. I also decided to install an automatic fire extinguisher as an added precaution. In all fairness there should be one installed in the generator bay anyway.
All in all, I am very satisfied with the product and the results. I have recommended this product to my other RV owner friends.
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Reviewed in the United States on April 13, 2025
★★★★★ 5
Great product. Best value i could find
Model: SLH20025
I'm using talk to text, so forgive any grammatical and spelling errors.
I ordered this product after doing a bit of research on sound dampening materials. I had been doing car stereo for quite some time since my teens. Itook a break for 20 years or so. I'm now 40 and back in the day there was dynamat. And that was about it. as irecently bought a new 2017 F350 crew cab. I wanted to put in a new stereo system and being that it was my dream truck. I was going to put in my dream stereo. But before I could do that, I needed to start with the sound deadening. I looked into today's leading product and found a company called resonx. Had taken their place as king of the hill in sound deadly. I researched their products and found the materials they were built from and Silas was the closest match at the best price I used Silas Max. First, then Silas 3 and 1 hybrid over that on all exterior panels. Then, on the interior panels. I used the 3 and 1 hybrid . on the floor I used Silas Max. Then, the 3 and 1 hybrid, then Silas liner over that the car is incredibly quiet . As far as sound dampening and deadening, it works very well for the money really can't beat it. Do your homework no How and where to apply it? And you really can't go wrong or about $400. I did. What would have cost me easily? Two thousand in other brands highly recommend the product prep work.Is everything do your homework?Do it right and you will be happy with this stuff
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Reviewed in the United States on May 6, 2026
★★★★★ 4
Not simple, nor easy
Model: SLH20025
I wanted to add sound proof material to the bare metal areas on the floor of my Toyota Tundra. The area behind the front seats had a haphazard application of sound deadening material. There were several complications to the project which may come up in other vehicles.
First is the floor covering which had plastic pillars underneath to support any weight on the cover. The sound deadening material had to be cut out so these pillars would rest on the bare metal of the floor. This required a lot of cutting with a utility knife and at times heavy scissors. The instructions say to make a template before cutting the material and I did this for the driver's side. This doubled the amount of time needed to install it. On the passenger's side I laid the rectangles of material with the backing on and pressed the floor covering onto the material. This showed where the support pillars were, which I then cut out.
Second is peeling the backing off the material. This can be very difficult as the adhesive sticks to it. The backing came off in multiple pieces and sometimes took 5 minutes for one piece. They say to wear gloves when handling the material but this is impossible when trying to get the backing off.
Third is pressing the material onto the metal. The instructions say to use a roller, but this was impossible for the irregular surface I was working on. The hand is the best tool to press the material on.
The material seems to be of high quality and I expect it will reduce the road noise in the cab.
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Reviewed in the United States on May 18, 2025
★★★★★ 5
Bringing a 1976 MG Midget to the modern world!
Material Type: 157mil Closed Cell Foam, Style: 157 mil 36 SqFt
I've been restoring a 1976 MG Midget barn find. I bought some Sinless liner to help make the car rattle less and feel more solid.
This product is easy to cut, easy to install, and extremely sticky. I used it to line the trunk, the interior, and even some under the hood of the old MG. The adhesive stands up to the brutal temperature of the engine bay, and when (by accident) some fuel spilled onto the foam, it didn't fall apart or turn to mush.
Thanks to Siless, the MG now feels like a modern car. The floor pans feel much more solid, the doors make a heftier thud when you close them, and the trunk no longer sounds like a percussion instrument when you touch it.
If you know what you're doing, this product will transform the feel of a car. I found that 36 sq ft was enough for my MG Midget, but for a bigger car I would want more. The pattern on the back helped me to cut perfectly measured squares and rectangles. The foam itself doesn't have a strong odor, it works super well, and has held up to several months of changing temperatures (in the Midwest US.)
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Reviewed in the United States on November 11, 2025