SKU: 24077083308
cybex isofix 360

cybex isofix 360 CYBEX Sirona Gi i-Size 360° Rotating Car Seat

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Description

cybex isofix 360 CYBEX Sirona Gi i-Size 360° Rotating Car SeatCybex Sirona Gi i Size 360 Rotating Car Seat Ultimate comfort and safety, for their first four years. The rear facing Cybex Sirona Gi i Size has 360 rotation for easy boarding. All round air ventilation for cooler rides. Extended rear facing for safer travel up 20kg. The latest car seat in our successful Cybex Sirona line is the most comfortable yet: the Cybex Sirona Gi i Size. This car seat also features integrated Linear Side impact Protection for

Cybex Sirona Gi i-Size 360° Rotating Car Seat

Ultimate comfort and safety, for their first four years. The rear-facing Cybex Sirona Gi i-Size has 360° rotation for easy boarding. All-round air ventilation for cooler rides. Extended rear-facing for safer travel up 20kg.

The latest car seat in our successful Cybex Sirona line is the most comfortable yet: the Cybex Sirona Gi i-Size. This car seat also features integrated Linear Side-impact Protection for defence from all directions.

A range of innovative features also upgrades your child's comfort, including 360° rotation in any recline position with the easy rotation handle, for smooth on and off-boarding. Innovative all-around air ventilation means the ride stays cool, and you have the option of choosing mesh fabrics for maximum breathability with the Plus fabric version.

Five recline positions are available in either direction - tailored comfort for your child, whether they're a tiny newborn or a fully-grown four-year-old (newborn inlay accessory sold separately). 360° of comfort and safety for their first four years: the Cybex Sirona Gi i-Size.

What are the features of the Cybex sirona Gi i-Size ?

UP TO 50% HIGHER SAFETY LEVELS*

Rear-facing is one of the safest ways to travel. In the critical first moments of a front impact, the child's body is pushed against the padded car seat shell, minimising movement and reducing the 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 Cybex Sirona Gi i-Size is designed for comfortable rear-facing travel until your child weighs 20 kg. (*compared to the same seat forward-facing in a frontal crash. Result of internal testing using 2,022 ADAC frontal crash test criteria.)

QUICK AND EASY ONBOARDING

A stress-free start to your journey. Just swivel the car seat to face the car door and get your child onboard. You avoid back strain, while your child stays comfortable in any recline position.

OPTIMAL BREATHABILITY

Comfort in any season. All-round air ventilation lets air flow through channels in the car seat, carrying away heat and helping avoid a sweaty ride for your little one. The Plus version also includes mesh fabric that increases breathability up to six times compared to regular fabrics.

GROWS WITH YOUR CHILD UP TO 4 YEARS OLD

As your baby grows, adjust the Cybex 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 only one hand is required.

SIDE-PROTECTION

Integrated 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 forces on the child.

ALWAYS IN A COMFORTABLE POSITION

Find the ideal recline setting, whether your little one is a new born or a growing child. Five positions are available in both riding directions – and in the boarding position, too. And when your child falls asleep, you can recline the seat with one hand, letting them dream that little bit longer.

STRAIGHTFORWARD INSTALLATION

It only takes moments to set up your Cybex Sirona Gi i-Size. Use an ergonomical handle to click the ISOFIX into the vehicle seat and extend the load leg. Both provide stability and extra safety. Visual indicators help you confirm the seat is ready to protect.

TECH SPECS

Regulation: UN R129/03
Child Age: approx. 3 months up to 4 years (From birth with new born inlay)
Child Height: 61 - 105 cm (From 40 cm with new born inlay)
Child Weight: Max. 20 kg

PRODUCT DIMENTIONS: L 710 mm / W 440 mm / H 750 mm
PRODUCT WEIGHT:13kg

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. 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
SKU: 24077083308

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4.8 ★★★★★
Based on 24 reviews
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Product Reviews
M
Verified Purchase
Mojoemil
Lexington, US
★★★★★ 5
The Most Comfortable Office Chair that I've Owned.
Color: Grey
This is by far the most comfortable office chair that I've ever owned or sat in. I've owned quite a few office chairs. Some big and comfy, some new ergonomic designs, some super expensive, others supplied by my employer, and even 2 other/prior Serta chairs. This, by far beats them all. I first purchased this chair for my wife in her office. She's of average size as well, but she always felt like she was being swallowed by some of the larger, more cushiony office chairs. She wanted to be comfortable, but didn't want to drown in the chair. I purchased this chair for her and she absolutely loves it. It's been a year now, and it's holding up well, looks great, and she has zero complaints. Which brings me to my personal purchase for myself. I'm average size. A little bulky, but not too big. I've been through so many chairs. They all feel great initially, but after a lot of use, I felt uncomfortable, or fatigued from sitting, and even sore. I have some lumbar back issues, and my tail bone occasionally gets sore if I sit too long, especially if I slouch over time. I was ready to buy a new chair, and it takes me forever to decide, however I do really like my wife's chair. So I purchased this chair for myself. I must say, that this chair is the best that I've used. It's not huge. You wouldn't be too comfortable trying to nap in it. But for sitting and working? It's amazing. Perfect lumbar support, super soft on the butt without swallowing you, and keeps you straight, and comfortable. I would definitely recommend this product.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 25, 2024
J
Verified Purchase
Jyn
Boise, US
★★★★★ 4
Petite person's perspective
Color: Grey, Color: Grey
Full name on the box: Light Grey Bonded Leather/Mesh Air Executive Chair (Model: 43807) This review is from a petite female’s perspective I was browsing for couple months and this Serta chair stood out to me, mainly aesthetically. I don’t see many chairs in this color or style. It matched with the rest of my PC/desk setup. Positives -Seat is comfortable. -Lumbar support is good. It helps me sit very straight. -The casters were surprisingly easy to put in. I had to use some force with two of them though. They roll fine on carpet. -Easy assembly Neutral/Negatives -Paint of armrests is easily scratched. I accidentally scratched it while installing the back. -The black plastic caps used to hide the screws don’t fit well. The plastic inserts for hiding screws in arms don’t fit well either. It makes the chair appear cheap. (I will provide images) -Craftsmanship isn’t the best. Not noticeable from a distance though. -At lowest setting, my feet can’t touch the ground but being 4’11” it’s to be expected. -Height of the back is too high for my liking. I prefer a few inches shorter so I can tilt my head back to rest my neck. My fault for not realizing I should look into "mid-back chairs". -Head/top area is too firm. I prefer it to be squishy (e.g. Serta Smart Layers Verona or Siena). As another reviewer mentioned, don’t forget to remove the foam or cardboard behind the lumbar and head/shoulder. That is supposedly the last step when assembly is all done. **If you come across any issues/warranty, you contact TRUE INNOVATIONS, not Serta. (I will provide images)
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 21, 2017
N
Verified Purchase
Not Your Average Joe
Battle Creek, US
★★★★★ 1
***Serta should recall this chair!
Color: Grey
Serta quality and comfortable for office use only, casual home use isn't the same... the only reason I didn't give it 5 stars for ergonomics is that if you are not sitting upright in "office mode" and you want to slouch and relax, the seat makes you feel like you are always sliding forward in the chair? I assume that is because it's an "ergonomic" chair, but it is well built and worth the price in my opinion. ***Updated addition; after using the chair to work from home & casual use, it is still annoying to feel like it tilts forward unless you are sitting up perfectly straight! I have also noticed that if you get up or reposition yourself (due to the forward sliding) the seat height resets itself back up to the top!? So when you sit back down you have to lower the seat again... my last Serta chair never had these issues!! For the price point, this shouldn't be a chair I will be replacing after a few months - but not with another Serta! ****Second update = now 1 star! (Chair still looks new, I only work from home 1 day a week, and take great care of my things so there is no damage or even usage wear) After trying to make the best of this chair, it is even more annoying to use.. it now "groans" when any movement rocking back or forth... it still feels like it is forcing you to slide forward and feels like the chair wants your to fall out! Leaning back doesn't stay (no adjustment to keep from "leaning forward") so no matter what I do, I hate sitting in this chair more every day... and now I am very worried about buying another chair blind online! ***Serta should recall this chair! *****Third update = Chair still looks and feels brand new, but now randomly will make weird creaking and groaning noises with every movement and as an added bonus it randomly just sinks to the lowest level without warning!!! Typing away and it just starts sinking until it hits bottom! I don't know how an expensive chair could be so awful!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 1, 2024
A
Verified Purchase
Amazon Customer
Battle Creek, US
★★★★★ 5
Office chair
Color: Grey
I bought this chair for my son and he’s very happy with the comfort of it. Very sturdy
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 1, 2026
C
Verified Purchase
Customer
Pawtucket, US
★★★★★ 3
Good chair, Hensley is more comfortable
Color: Grey, Color: Grey
Received chair in a large box and assembly was easy. Instructions call for 2-person assembly but I set out to do as much as I could by myself until someone else was available. No tools needed other than the Allen wrench provided. I assembled the chair in under an hour by myself. The 2 person portion of the assembly was for attaching the seat to the wheel assembly but I managed to attach it myself with some careful maneuvering. The chair is nice and comfortable enough, but I was spoiled by the comfort of trying a different Serta model (Hensley, now discontinued) ina store. I couldn't find that model anywhere else and the floor model was SOOOO comfortable with its Serta Smart Layers. I was hoping Bryce would be a close second. After trying Bryce for a few days, I'd say its a distant third. If I never met Hensley, Bryce might have a higher rating. Update: based on other reviews, I made covers for the armrests to prevent wear and peeling of the padding cover.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 5, 2025

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