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Cybex

Sirona Gi i-Size Car Seat- Lava Grey

Name: Sirona Gi i-Size Car Seat- Lava Grey
Brand: Cybex

The BubsNest Verdict

The Cybex Sirona is a well-regarded car seat that has won multiple safety and design awards. Parents highlight its comfortable padding, sleek look, and ability to rotate 360 degrees. However, some note it can be heavy and bulky, and that the rear-facing mode may not provide enough leg room for older toddlers. Overall, it seems a solid choice for families seeking a safe, long-lasting car seat, though taller or heavier children may outgrow the rear-facing use earlier than expected.

BubsNest expert analysis of 4 parenting forum discussions

£5,934.52

Available at

Bundle Baby

£5,934.52

Prices compared across 1 retailers · Updated 19 May

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What parents say

BubsNest expert analysis of 4 parenting forum discussions

“Award-winning car seat with safety and comfort, but some size/weight drawbacks”

7.8

Solid Choice

What parents love

Safety and awardsThe Sirona has earned top safety ratings and design awards, giving parents peace of mind.

Comfort and paddingParents praise the seat's plush, supportive padding that keeps children comfortable on long rides.

360-degree rotationThe ability to rotate the seat 360 degrees makes it easy to get children in and out.

Worth knowing

Rear-facing limitationsSome parents report the rear-facing mode doesn't provide enough leg room for taller toddlers.

Weight and bulkThe Sirona is described as quite heavy and bulky, which can make it difficult to move between vehicles.

ISOFIX-only installationThe Sirona can only be installed using ISOFIX, which may be an issue for some vehicles.

Best for

Families seeking a high-quality, long-lasting car seat with premium safety features
Parents who value a sleek, modern aesthetic in their baby gear

May not suit

Taller or heavier toddlers who may outgrow the rear-facing mode sooner than expected
Families who need to frequently move the car seat between vehicles

Tips from parents

Before You Buy

Check your vehicle's ISOFIX compatibility, as the Sirona cannot be installed without it.

Getting the Most Out of It

Watch the online installation videos carefully, as the seat has a few tricky setup steps.

Safety Note

Be sure to follow the rear-facing weight and height limits, as exceeding them could compromise safety.

Product details

The latest car seat from the successful Cybex 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 forward and rear driving 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 Sirona Gi i-Size. Key Features: Up to 50% Higher Safety Levels* 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. *compared to the same seat forward-facing in a frontal crash. Result of internal testing using 2022 ADAC frontal crash test criteria. Quick and easy onboarding 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. 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. The clear choice for comfort in any season. Easy Onboarding 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. Grows with your child up to 4 years old 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. 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 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 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. What’s in the box?: Cybex Sirona Gi i-Size Car Seat & Attached ISOFIX Base (one unit car seat is fixed to base) Please note: the car seat cannot be removed from base. Specification: Regulation: UN R129/03 Child Height: 61 - 105 cm (From 40 cm with newborn inlay) Child Weight: Max. 20 kg; from approx. 3 months up to 4 years (From birth with newborn inlay) Child Height: 61 - 105 cm (From 40 cm with newborn inlay) PRODUCT DIMENTIONS: L 710 mm / W 440 mm / H 750 mm