CYBEX Sirona Si

The CYBEX Sirona Si makes everyday car journeys easier with a rotating seat designed for growing children. Suitable for extended rear-facing travel up to approximately 4.5 years, it features an energy-absorbing shell, Linear Side-impact Protection and magnetic belt holders to simplify getting your little one settled.

    CYBEX Sirona Si FAQs

    The CYBEX Sirona Si is designed for children measuring 61–105cm, typically from around 3 months to 4.5 years. It can also be used from 40cm with the separately available newborn inlay.

    Yes. The Sirona Si supports extended rear-facing travel up to approximately 4.5 years. Forward-facing use is also available when appropriate for your child and in line with the manufacturer's instructions.

    The Sirona Si includes the Base S, while the Sirona S uses a separately purchased Base S.

    The Sirona Si features an energy-absorbing shell and Linear Side-impact Protection (L.S.P.), which helps reduce impact forces by up to 25%, based on internal testing. An adjustable headrest and harness help provide a supportive fit as your child grows.

    Both versions offer the Sirona Si's core features, including the included Base S. The Style version adds breathable 3D mesh fabrics, leather-look accents and an integrated XXL UPF50+ sun canopy.

    Yes. The CYBEX Sirona Si includes the Base S, which offers one-handed 180° rotation to help make getting your child in and out of the car easier.