Cybex Sirona S i-Size review
Test score %
- i-size
- Baby to toddler
- Extended rear-facing
The Cybex Sirona S i-Size has a 360-degree swivel base, which can be activated with one hand to enable you to get your child into and out of the car seat easily, which in theory means less back strain. Its rearward facing up to 105cm, which is about four years old, and has a safety feature to prevent babies from being turned forward-facing too soon. Our review details how well it would hold up in a front and side collision, so you know whether to buy it for your little one.
- Pros and cons
- What is it?
- How safe is it?
- Is it easy to fit?
- Is the seat comfortable?
- Is there anything I should watch out for?
- Is there anything else I should know?
- Should I buy it?
Technical specifications
Key information
- StageBaby to toddler
- Direction of travelRearward-facing/forward-facing
- Manufacturer URLwww.cybex-online.com/site/uk
Test results
The overall Which? test score is made up of the following star ratings, all determined by our rigorous lab tests.
Find out how we test child car seatsPut us to the test
Our Test Labs compare features and prices on a range of products. Try Which? to unlock our reviews. You'll instantly be able to compare our test scores, so you can make sure you don't get stuck with a Don't Buy.
Make smarter choices
- 0%Lowest score
- 65%Average score
- 82%Highest score
Put us to the test
Our Test Labs compare features and prices on a range of products. Try Which? to unlock our reviews. You'll instantly be able to compare our test scores, so you can make sure you don't get stuck with a Don't Buy.
Suggested alternatives
Related articles
Best baby car seats
Key safety differences between baby car seats and child car seats. Why babies need more protection in car crashes and how to keep them as safe as possible. Plus car seat carrycots vs baby car seats.
How to buy the right child car seat
Get our expert advice on which car seat you need for a newborn, baby or child. We explain car seat weight groups and i-Size, and give top tips on how to buy the best child car seat when you head to the shops.
Car seat weight groups
Which? guide to car seat weight groups. From group 0+ 0-13kg (birth to around 12-15 months to Group 1/2/3 9-36kg (around 9 months to 12 years), find out why car seat weight groups matter and when to go up a car seat group