Sirona Gi i-Size 360 Rotating ISOFIX Toddler Car Seat

Free standard delivery
Free Click & Collect

Moon Black
Product description

Product code: 31551211

  • Suitable for children 61-105cm in height. Can be used from 40cm (birth) with the newborn inlay accessory sold separately.
  • R129-compliant (i-Size ready)
  • Isofix compatible

The latest car seat in Cybex's successful Sirona line is the most comfortable yet: the Sirona Gi. With extended rear-facing for safer travel up 20kg, this car seat also features integrated Linear Side-impact Protection for defense 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, and you have the option of choosing mesh fabrics for maximum breathability with the Plus fabric version.

Key Features:

  • Up to 50% higher safety levels* - with 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 the force acting on the child’s neck. Mandatory up to 15 months (76cm), we recommend keeping your child rear-facing for as long as possible. The Sirona Gi is designed for your child to sit comfortably rear-facing until they weigh 20kg.
  • Quick and easy onboarding - for 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. It also features ingenious loops designed to keep the harness out of the way as you get your child onboard.
  • Optimal breathability - 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.
  • Grows with your child up to 4 years old - As your baby grows, adjust the Sirona Gi's 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.
  • Side-protection - 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.
  • Always in a comfortable position - For every moment, whether your little one is a newborn or a growing child, the ideal recline setting (5 recline settings) 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.
  • Straightforward installation - It only takes moments to set up your Sirona Gi. 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.

*compared to the same seat forward-facing in a frontal crash. Result of internal testing using 2022 ADAC frontal crash test criteria.


  • Under no circumstances should a rearward-facing car seat be used on a passenger seat where there is an active airbag.
  • Correct fitting of all car seats and boosters is of paramount importance in making them the most effective in the event of an accident. Not all car seats fit all cars and it is important to check for fitting suitability on all cars you intend to fit the seat to, as well as re-checking if you change your car.
  • Always read the instruction booklet that comes with your car seat to achieve a safe and correct fitting, retaining the guide for future reference. We recommend fitting your car seat in advance of first using it.
  • We recommend that babies shouldn't be left in car seats (infant carriers) for prolonged periods.
  • Suitability:

    • Please make sure that you check the car seat you choose is suitable for your car before ordering. This can be done in store with a Partner or on the car seat manufacturer's website.
    • Some of our shops offer a car seat fit test, where a Nursery advisor will test the display model in your car to check that it will fit properly. Please contact your local shop to see if this service is available. Alternatively, please contact the car seat manufacturer who will be able to advise whether their model will be suitable for your car.
    • We also offer in-store and virtual appointments so you can access our All Things Baby services at a time and place to suit you. Click here to book your appointment. or find your nearest department store here.

    All the car seats in our range are designed to give your child the best possible protection and meet the criteria set out in the R129 (iSize) safety regulation. A baby must travel in the safer rear-facing position up to the minimum recommended age of 15 months. Some R129 car seats can be used rear-facing until a child is 105cm tall, which is around 4 years old.

    Side impact testing is assessed as part of the regulation to improve the protection of the child’s head and neck. R129 also makes use of the most high-tech crash test dummies which not only has improved sensor technology to test for greater sensitivity, but it also features more sensors on fragile areas of the body. iSize is an enhancement of R129 that makes it easier to confirm your car seat's compatibility with any iSize approved vehicle - reducing the risk of installing your car seat incorrectly. While all i-Size car seats meet the R129 testing standards, not every R129 car seat is an iSize compatible seat.

    R129 (iSize) car seats are classified by height only. The below table is a rough guide as to how the car seats can relate to a child’s age based on the average child's height. In some instances, we may still need to check the weight of the child within the height band due to the maximum mass load permitted on a vehicle’s ISOFIX points.

    TypeHeight of ChildApprox. Age of Child
    Baby40-85cmBirth up to 15 months
    Toddler40-105cmBirth up to 4 years
    Toddler40-150cmBirth up to 12 years
    Toddler76-150cm15 months up to 12 years
    Child100-150cm4 to 12 years

    Note: This is a rough guide only. Please always refer to the individual car seat’s guidance for more specific details. Some car seats will be approved for use across two or more height bands. This just means that these seats have the ability to adapt as your child grows, meaning they can use them for longer.

    Product specification
    Car Seat Type
    Baby Car Seats, Toddler Car Seats
    Care instructions
    Wash fabrics at 30°C
    Country of Origin
    H75 x W46.6 x D74.4cm
    Drying Instructions
    Line Dry
    Facing Position
    Forward Facing, Rear Facing
    Height Band
    Isofix compatible
    Manufacturer's Warranty
    2 years
    R129 Regulation
    R129 Compliant and iSize
    Cybex Solution G
    Reclining positions
    Unpackaged Weight Car Seat + Isofix Base
    Unpackaged Weight Car Seat Only
    Washing Instructions
    30°C wash
    Brand information

    A leader in child safety. A fashionable lifestyle brand. A fearless innovator creating tomorrow’s products today. Cybex is a parenting company like no other. As one of the most trusted brands in baby travel and with a wide range of products, Cybex have got you covered whether you’re searching for the perfect car seat, pushchair or travel system.

    Cybex designs products for parents while pushing the boundaries. At the core of the brand and its product developments stands the Cybex D.S.F. Innovation Principle, combining luxurious design and comfort without compromising on safety or functionality. From the innovative lie-flat and rotating baby car seats to the practical pushchair travel systems and bundle offers, Cybex are always questioning the status quo and not afraid of challenging the establishment. With a Cybex product, you and your family can enjoy complete peace of mind from day one.

    Delivery & returns
    Standard Delivery
    UK delivery within 2 to 5 days, 8am - 8pm, Monday to Saturday. Free on orders over £50, otherwise £4.50.
    Click & Collect
    Free on orders over £30, £2.50 if you spend less. Choose a collection day at checkout, next day available at some locations. Available at Waitrose, selected John Lewis shops, Shell stations and Booths stores.
    Evening Delivery within London M25
    Order before 10am to get same day evening delivery within London M25. Available 7 days a week, delivery between 6 – 11pm on a day of your choice. We’ll text you a 1-hour delivery window on the day. Delivered by 100% electric vehicles.
    Next or Named Day Delivery
    Delivery on the day of your choice, 8am - 8pm, 7 days a week. You'll receive a text on the morning of delivery with a 1-hour delivery window.
    Morning Delivery
    Delivery on the day of your choice, by 10.30am available 7 days a week.
    Local Collection Network
    Not available for this item


    Return small or medium items by post or to John Lewis & Partners and Waitrose & Partners shops.

    Large items (delivered by two people, such as appliances and furniture) can be returned using our Home Collection service.

    You can also return a Click & Collect order to where you collected it.

    Product review details, this product has received, on average, 4.60 out of 5 star rating.
    The average rating is4.6out of5