Cybex Sirona S2 i-Size Car Seat From £249.00

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From £249.00
RRP £299.95Save 17%
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Cybex Sirona S2 i-Size

  • i-Size, R129/03
  • Height: 61 – 105 cm (from 45 cm with newborn inlay)
  • Age: from approx. 3 months up to 4 years (from birth with newborn inlay)
  • Weight: max. 18 kg

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 is 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 be rest assured your child is protected.


  • Sirona S2 i-Size Toddler Car Seat
  • Integrated Base
  • User Guide


  • 360˚rotation mechanism

    The 360° rotation mechanism takes the back strain out of getting your child onboard. It is 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 could not be easier.
  • Rear-facing car seat

    When positioned rear-facing, the seat significantly reduces the risk of injury in case of a head-on collision. The Sirona S2 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 S2 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). However, CYBEX recommends that children travel rear-facing in the Sirona for as long as possible.
  • Energy Reduction Technology

    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%.
  • Integrated L.S.P. System

    The integrated L.S.P. System increases safety in the event of a side-impact collision. In combination with the energyabsorbing shell, it can reduce the force of a side impact.
  • One-hand recline function

    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 is easy to find the perfect sleeping position.
  • Height-adjustable headrest

    The height-adjustable headrest has 12 settings for a customised fit. As your child grows it is simple to adapt the seat to keep pace.
  • Belt holder

    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!

    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.
  • Energy-absorbing shell

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


  • Dimensions: Length 71cm x Width 44cm x Height 68cm
  • Weight: 13.9kg
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