Cybex Sirona S2 i-Size 360˚ Rotating Car Seat


Sirona S2 i-Size Car Seat

Compatible with SensorSafe

Reliably safe and easy travel 

Say goodbye to hassle and back strain at the start of your journey. The Sirona S2 i-Size car seat features a genius one-hand 360° rotation mechanism for a fast entry and exit. It’s your new secret weapon for easy and comfortable boarding.

The Sirona S2 i-Size lets your child sit rear-facing to improve safety in the event of a head-on collision. If you make the switch to forward-facing, Energy Reduction Technology makes the journey safer. The headrest and harness system are designed to reduce the energy of impact forces, so whichever travelling direction you choose you can rest assured your child is protected.

Only suitable from newborn if purchased with the newborn inlay.

360˚ rotation mechanism

Rear-facing car seat

Energy Reduction Technology


Quick and easy to get your child onboard
The 360˚ rotation mechanism takes the back strain out of getting your child onboard. It's a breeze to swivel the seat to the door side and get your child in and out. Switching between rear and forward-facing travel also couldn't be easier. 

Comfortable travel in the safest position
A rear-facing car seat improves your child's safety in the event of a head-on crash. In this position front impact forces are distributed across the car seat shell. It is mandatory for children to travel rear-facing until they are over 15 months old and 76cm tall. However, Cybex recommends that children travel rear-facing in the Sirona for as long as possible. 

Reduces Impact Forces in the Forward-Facing Position 
Energy Reduction Technology improves safety performance during front-facing travel. Impact forces are transmitted directly into the car seat via the harness system, where they are partially dissipated by energy-absorbing materials. This reduces the forces acting on the child's sensitive neck by approximately 20%.

Reduces the force of a side-impact collision
The integrated L.S.P System increases safety in the event of a side-impact collision. In combination with the energy-absorbing shell, it can reduce the force of a side impact.

Easier to get your child in & out of the seat
The belt holders are a genius feature that give you a helping hand with getting your child on board. Hook the harness straps out of the way - the simple solution to tangled-up limbs!

Quick change to a sleeping position
The one-hand recline function makes a peaceful drive only a moment away. Quickly adjust the seat and your child can take a relaxing nap on the go. With five settings available in both riding directions, it's easy to find the perfect sleeping position.

Straightforward installation and anchorage in your vehicle
ISOFIX is a reliable way to install the car seat in your vehicle. Set-up is simple with fast one-click attachment and a load leg to anchor the seat in the vehicle. Easy-to-check indicators confirm when the seat is installed and ready to go. 

Diverts impact forces away from your child 
The energy-absorbing shell is designed to flex with an impact and channel dangerous forces away from your baby.

Grows with your child up to 4 years old 
The height-adjustable headrest has 12 settings for a customised fit. As your child grows it's simple to adapt the seat to keep pace. 


UN R129/03



61 – 105 cm (From 45 cm with newborn inlay)


Max. 18 kg


From approx. 3 months up to 4 years (From birth with newborn inlay)


L 710mm / W 440mm / H 680mm


Newborn Inlay: The Newborn Inlay allows a baby to snugly fit inside the car seat. Your baby is protected in an ergonomically correct position. Suitable for babies from 45-60cm. 
Summer Cover: Soft viscose fabric made from bamboo cellulose. The summer cover absorbs and regulates moisture to keep the child cool and dry on hotter days.
Car Seat Cup Holder: The practical cup holder keeps drinks nearby and safe.
ISOFIX Guides: Make car seat installation easier whilst protecting fabric and leather seating. 
SensorSafe 4-in-1 Kit: Cybex fuses smart technology and smart design with the introduction of SensorSafe: helping you keep track of the safety and well-being of your child.

For more information on car compatibility and dimensions of the car seat, follow the below link:


Please note some items may not be readily available and there may be a 1-4 week wait, on receipt of your order a senior member of our nursery department will call you to confirm the delivery date.



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