Cybex Sirona S i-Size 45-105cm, Soho Grey

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  • € 399.00
  • € 519.00
You save: € 120.00 (- 23 %)
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Sirona S i-Size, (45cm-105cm) car seat

The Sirona S i-Size car seat rotates 360˚ on its integrated base for easy boarding and switching from rear to forward-facing.


Product Details

No more awkward lifting and back pain when helping your child in and out of the car seat. The innovative one-hand 360° rotating mechanism provides a comfortable entry and exit position, ensuring less strain on parents backs.


360° convenience for you – optimised safety for your child

Because its the safest way for your little one to travel, the Sirona S i-Size provides comfortable rear-facing travel for children up to 105 cm, approx. 4 years. The Driving Direction Control (DDC) prevents forward-facing use before the child is at least 16 months old and 76 cm tall. Sirona S i-Size also offers increased safety for your child in the forward-facing position thanks to the Energy Reduction Technology. It is activated as the forces reach their full impact in a head-on collision: The headrest slides down, progressively limiting the neck’s exposure to the impact forces, and subsequently locks into position.




360° Rotation Mechanism

A clever 360° rotation system makes life easier and less back-breaking for parents. The innovative 360° rotating mechanism of the Sirona S i-Size makes switching between rearward and forward-facing position easy. In addition, it provides a comfortable entry and exit position with less strain on parents backs.


Rear-Facing Car Seat

Significantly reduces the risk of injury in case of a head-on collision. The Sirona S i-Size allows you to transport children rear-facing from birth up to a height of 105 cm (up to 18 kg, approx. 4 years). Depending on your preference, the Sirona S i-Size can also be used as a forward-facing car seat for children (starting from min. 76 cm and 16 months up to 105 cm).


Driving Direction Control

The Driving Direction Control (DDC) prevents misuse of the forward-facing position of the car seat. It ensures the forward-facing position is not used before the child is at least 16 months old and 76 cm tall.


Energy Reduction Technology

Reduces the strain on the neck in case of a front impact (forward-facing). The Energy Reduction Technology of the Sirona S i-Size offers increased safety for your child in the forward-facing position in the event of a head-on collision. It reduces the forces on the neck of a child during a front crash by approximately 20%, compared to other existing harness systems.


Integrated Side-Impact Protection

Extendable on side facing the car door. The integrated L.S.P. System of the Sirona S i-Size offers increased safety in the event of a side-impact collision. It reduces the force of a side impact in combination with the energy absorbing shell by approximately 25%.


Height-adjustable headrest

12 positions for customized adjustment as your child grows


One-Click Installation

A one-click installation with ISOFIX both in rear- and forward-facing position allows for simple installation and guarantees increased safety. Sirona S i-Size is secured using the cars ISOFIX system and requires no further fastening. An installation indicator also helps to prevent a possible misuse.


Energy-absorbing shell

Absorbs the forces of an impact and protectively covers the baby


Belt holder

Makes taking your child out of the seat easy.


One-hand recline function

Easily adjusts to the perfect position (rearward facing: 5 positions; forward facing: 3 positions)



  • 360° Rotation Mechanism
  • Rear-Facing Car Seat
  • Driving Direction Control
  • Energy Reduction Technology
  • Integrated Linear Side-Impact Protection
  • Height-adjustable headrest
  • One-Click Installation with ISOFIX
  • Energy-absorbing shell
  • Belt holder
  • One-hand recline function



Installation with base: Pay attention to the i-size logo. If a vehicle seat is marked with this logo, it is suitable for use with all i-size child seats and therefore will not appear in our list of compatible vehicles. If your vehicle does not have an i-Size seat, please check the compatibility of your vehicle. If your vehicle is not displayed, please contact our customer service team.


Technical info:

  • i-Size Norm, UN R129/02
  • Height: 45 cm - 105 cm
  • Weight: max. 18 kg
  • Age: From birth up to approx. 4 years
  • Length 710 mm, Width 430 mm, Height 640 mm
  • Weight 14.3 kg


Care Instructions:

  • Fabric covers machine washable at 30°


What is included?

Sirona S i-Size Toddler Car Seat

Newborn Inlay

Integrated Base

Model code: 36-DEF232582
Product code: 232582
Color: Soho Grey
360° spin
Isofix connection
Backrest positioning
i-Size standard

Transport information

The estimated delivery time depends on the transport method chosen by the customer. If the item is out of stock, please contact our customer service regarding availability!