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Description
cybex 360a Cybex Sirona Gi i-Size 360 Car Seat with Isofix Base – Magic Black – Mamas & Papas UKCybex Sirona Gi i Size 360 Car Seat with Isofix Base Magic Black The latest car seat in the successful Sirona line is the most comfortable yet: the Sirona Gi i Size. Extended rear facing for safer travel up 20kg, this car seat also features integrated Linear Side impact Protection for defence from all directions. A range of innovative features also upgrade your childs comfort, including 360 rotation in any recline position with the easy rotation
Cybex Sirona Gi i-Size 360 Car Seat with Isofix Base – Magic Black
The latest car seat in the successful Sirona line is the most comfortable yet: the Sirona Gi i-Size. Extended rear-facing for safer travel up 20kg, this car seat also features integrated Linear Side-impact Protection for defence from all directions.
A range of innovative features also upgrade your child’s comfort, including 360° rotation in any recline position with the easy rotation handle, for smooth on and off boarding. Innovative all-round air ventilation means the ride stays cool.
Five recline positions are available in either direction to ensure ultimate comfort for your child, whether they’re a tiny newborn or a fully-grown four-year-old (newborn inlay accessory sold separately).
Comfort and safety for their first four years with the Sirona Gi i-Size.
*compared to the same seat forward-facing in a frontal crash. Result of internal testing using 2022 ADAC frontal crash test criteria.
Product Features:
- Extended rear-facing – one of the safest ways to travel in a car seat. In the critical first moments of a frontal impact, the child’s body is pushed against the padded car seat shell. This keeps movement to a minimum and reduces force acting on the child’s neck. Mandatory up to 15 months (76 cm), we recommend keeping your child rear-facing for as long as possible. The Sirona Gi i-Size is designed for your child to sit comfortably rear-facing until they weigh 20 kg.
- A stress-free start to your journey. Just swivel the car seat using the easy rotation handle to face the car door and get your child onboard, in any recline position. You can avoid back strain, while your child stays comfortable in the recline position that fits them, whether they’re a newborn or a toddler. Switching from rear to forward-facing travel is just as easy.
- The all-round air ventilation of Sirona Gi i-Size allows air to flow through ventilation channels within the car seat, carrying away heat and helping avoid a hot and sweaty ride for your little one. Choosing the mesh fabric available on the Plus version increases airflow even more – with up to 6 times more breathability than comparable car seat fabrics. The clear choice for comfort in any season.
- When you’re getting your child strapped into the car seat, you need all the help you can get. The Sirona Gi i-Size features ingenious loops designed to keep the harness out of the way as you get your child onboard.
- As your baby grows, adjust the Sirona Gi i-Size headrest for a comfortable fit at every stage. 12 positions allow a tailored fit to your child, with the harness lengthening automatically with each adjustment. And it can be adjusted with one hand for extra ease of use.
- The Linear Side-impact Protection defends your child against the force of a side impact. Working together with the energy-absorbing shell, the L.S.P. System significantly reduces the effect of impact force on the child.
- For every moment, whether your little one is a newborn or a growing child, the ideal recline setting is available in both riding directions – and in the boarding position, too. And when your child falls asleep in the seat, you can recline it with one hand, letting them dream that little bit longer.
- It only takes moments to set up your Sirona Gi i-Size. Use an ergonomic handle to click the ISOFIX into the vehicle seat and extend the load leg down to the car floor. Both provide stability and extra safety in the event of an accident. Visual indicators help you confirm the seat is ready to protect.
This Item Includes: Sirona Gi i-Size Car Seat & Integrated ISOFIX Base
Age Suitability: 3 months to approx. 4 years (from birth with newborn inlay – sold separately)
Weight Suitability: Max 20kg
Composition: Polyester blend
Health & Safety: UN R129/03
Care & Maintenance: Wash fabrics at 30 degrees, wipe down.
Self-Assembly Required?: Assembled
Dimensions: 71cm x 44cm x 75cm
Weight: 13kg
- Up to 50% higher safety levels
- Quick and easy on-boarding
- Optimal breathability
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
4.6 ★★★★★
Based on 2496 reviews
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Product Reviews
★★★★★ 1
TPMS Compatability is a LIE
Size: Sedan, Crossover, Small Truck
2018 Subaru Impreza, with one tire with a slow leak (about 2 PSI a week) that I couldn't trace.
I bought the "Full-Size Sedan, Small Truck, Crossover" kit (the 6 oz. pouch) based on my tire size, 225/40/18.
After I removed the valve core, attached the dispensing hose and opened the cap, the product would not flow into the tire. I squeezed the pouch, but that only made the product leak out around the valve stem onto the wheel and driveway. I tried rotating the tire so the valve stem was at the top, and and also at the bottom. I even took the wheel off so I could get a fully vertical flow. Nothing worked. I finally gave up after only about half the product was dispensed, and I do think most of it went somewhere other than in the tire.
I reinstalled the valve core, remounted the wheel, plugged in my little lighter socket-powered compresseor, and tried to inflate the tire. And ... NOTHING. The pressure reading on the compressor immediately shot up to over 100 PSI, and it automatically shut off. Tried multiple times, with the same result. I again removed the valve core, and a) no air came out of the tire when I removed it, and b) even with no valve core the compressor still would not pump air into the tire. Clearly the gunk had completely blocked the valve/TPMS.
Fortunately, when I took the tire to Costco (where I'd bought it), they were able to fix the damage I'd done, as well as patching a small nail hole in the tread I hadn't seen (that was clearly the source of the slow leak) for no charge. Since I've already submitted a refund request, ultimately all it really cost me was my time and effort ... and a whole lot of stress.
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Reviewed in the United States on November 26, 2024
★★★★★ 5
Forget the gooey stuff, this product WORKS! See UPDATES 1 and 2
Size: Compact Car, Mid-size Sedan
I've had a slow leak in one of my tires for some time. It's a common thing with chrome plated alloy wheels, they get corrosion on the bead area where the tire seals and then you get a slow leak. This was the only product which is water soluble so it's not going to make a permanent mess inside the tire; additionally, it contains tiny bits of Tufsyn which is the material some tires are made from. So it's not just a liquid that is sealing the leak, it's tiny bits of rubber. I was putting 5 or 6 lbs of air in my tire every few days, and I could see that the tire was getting low. I installed this TireJect per the instructions a week ago and the tire appears to be doing great, despite the fact that we've had some very cold weather. (I didn't want to check it with a gauge while it was this cold out because just in case the tire's valve didn't seal all the way; I'll check with a gauge when this cold snap is past.) While I can't say for 100% sure that there is no more leak, I suspect that the leak has been sealed up completely. This is a product unlike the others and I think it's worth the price.
FIRST UPDATE: It has been two months and I haven't had to add any air at all to the tire where I used this product. There was a slow rim leak which was losing about a pound or so per day and it has been totally fixed. The car has sat for several days a few times, including in single digit cold weather, as well as driven regularly otherwise, and the tire hasn't lost any air. I think it's the micro Tufsyn fibers in this product which seal leaks better than some goopy glue stuff other brands are made of. I totally recommend this product!
SECOND UPDATE - it's been eleven months since I added this to my tire with the slow rim leak and I have not had to add air a single time. Not once. THIS STUFF WORKS. Forget the slime and foam and get this.
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Reviewed in the United States on December 5, 2024
★★★★★ 5
TireJECT cannot work miracles
Size: Compact Car, Mid-size Sedan, Size: Compact Car, Mid-size Sedan
TireJECT is a surprisingly thin fluid that supposedly contains fibers that must help stop up holes. Frankly I'm still confused as to how this stuff can plug a leak, but apparently it does. Tons of reviews say so.
I say apparently because the product did not completely stop a slow leak in my tire, but that's OK. I knew it likely wouldn't. I'll have to replace the tire unfortunately.
I had a garage install four nearly-new tires on my car. After installing, a heavy leak was discovered in one of them. They took the tire off again and found a small tear near the rim/bead of the sidewall. Since the tear would be flat against the rim, they suggested to let them try and repair it with tire patch adhesive and lots of bead sealer. They were confident, so I went for it. It seemed to work, but it went flat a few days later.
TireJECT seemed like the perfect solution to the slow leak since I wouldn't have to disturb the repair. I bought the kind without the syringe and regretted it immediately upon trying to use it. First, the valve stem removal tool broke as it loosened it. I had to buy a new tool down the road. When I went to inject, I squeezed as hard as I could but it just wouldn't flow past the TPM. It also kept leaking out of the flex joint of the nozzle. I had a huge syringe on hand, so I sucked up the rest from the bag, ziptied the hose on both ends and got the rest of the product into the tire. HURRAY!
The tire pressure had fallen considerably by the next morning. BOOOoo. I contacted TireJECT, and after several emails (and long waits in between). They determined their product was not suitable for my use case. They refunded what I paid without me even asking. I really appreciated that.
That said, before injecting, the tire would go flat overnight. So, TireJECT does work to a good degree. I'm half tempted to overdose the tire with another package.
Give TireJECT a try! Though, be sure your situation matches their criteria. If you have a TPM, opt for the package that comes with a syringe. You will need it. Also, throw the cast pot metal, tire stem tool out and get a decent machined one before you do the repair. Thank me later.
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Reviewed in the United States on April 1, 2025
★★★★★ 5
Works once again!
Size: Compact Car, Mid-size Sedan
Third time using TireJect on a vehicle, and it's worked perfectly each time. First was the off-road formula for leaking motorcycle tire beads.... then this formula my light SUV with a slow leak until I could get the tire replaced. This was for a stubborn tire that had a leak SOMEWHERE, and usually would lose 10-15 psi overnight after a fill-up. Two days later, still fully inflated and no signs of trouble. This is great because this formulation is also okay for tire pressure sensors. Will continue to purchase this product for similar issues going forward. High quality, durability, and easy to use.
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Reviewed in the United States on October 29, 2025
★★★★★ 5
Works like a champ!
Size: Full-size Truck, SUV
It works great! I had one fairly slow leak and 2 very slow leaks. 3 Tires. 2 were on my 94 Ford Ranger. I put a little more than 1/2 the packet in my fastest leaking tire (on the Ranger) and about 1/4 of the packet in the 2nd tire of the same vehicle. Lastly, I put the final 1/4 in a very slow leaking tire on my 2000 Ford F-150. All tires have stopped leaking!! I am delighted with the effectiveness of this product!!
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Reviewed in the United States on May 13, 2026