The Cybex Sirona G is one of the most advanced 360° rotating i-Size car seats available, offering outstanding safety, comfort and everyday convenience for children from approximately 3 months to 4 years (61–105cm). Designed to work exclusively with the Cybex Base G, the Sirona G makes every journey easier with effortless one-hand 360° rotation, allowing parents to lift their child in and out of the car with less strain while making everyday travel simpler. Suitable for extended rear-facing travel, the Sirona G supports the safest way for young children to travel, while also offering the flexibility of forward-facing use when your child is old enough and meets the recommended requirements.
Engineered to meet the latest UN R129/03 i-Size safety standards, the Cybex Sirona G combines intelligent safety technology with premium comfort. Integrated Linear Side-impact Protection (L.S.P.) helps reduce impact forces during a side collision, while the energy-absorbing shell provides additional protection around your child. Multiple recline positions, all-round air ventilation and a height-adjustable headrest ensure your little one remains comfortable whether you're heading on the school run, commuting through the city or embarking on longer family adventures. The spacious seat design also gives growing toddlers plenty of room to travel in comfort throughout their early years.
For families already using the Cybex Cloud G or Cloud G3 infant carrier, the Sirona G provides a seamless next step. Both seats are compatible with the Cybex Base G, allowing you to continue using the same ISOFIX base as your child transitions from an infant carrier into a toddler car seat. This not only offers excellent value but also creates a familiar and convenient travel solution that grows with your family.
At Chelsea Baby, we stock the complete range of Cybex Sirona G and Cybex Sirona G Plus car seats in the latest colours, giving you access to one of the UK's leading collections of Cybex products. Our experienced nursery specialists are on hand to help you compare models, explain the differences between the Sirona G and Sirona G Plus, and ensure you choose the right seat for both your child and your vehicle. Whether you're looking for a premium rotating car seat, an i-Size toddler car seat, or the perfect upgrade from the Cloud G, the Cybex Sirona G delivers exceptional safety, innovative design and everyday practicality that parents can rely on from the very first journey.
Extended Rear-Facing Safety for Maximum Protection
The Cybex Sirona G3 is designed to keep your child rear-facing from birth up to approximately 4 years (40–105cm), helping parents follow the latest child safety recommendations. While UK law requires children to remain rear-facing until at least 15 months, safety experts recommend extended rear-facing for as long as possible because it offers significantly greater protection in the event of a collision. When used in the rear-facing position, the Sirona G3 provides up to 50% higher safety levels compared to a conventional forward-facing car seat in a frontal impact (based on Cybex internal testing). Its energy-absorbing shell, advanced impact protection and supportive headrest work together to distribute crash forces across the seat while keeping your child securely positioned, reducing movement and minimising strain on the head, neck and spine. As one of the safest 360° rotating car seats in the Cybex Gold range, the Sirona G3 offers exceptional comfort, convenience and peace of mind from newborn through to preschool years.
360° Rotation for Effortless Everyday Travel
Getting your little one in and out of the car has never been easier. When paired with the Cybex Base G Isofix Base, the Cybex Cloud G3 features a smooth 360° rotating mechanism that allows the infant car seat to turn towards the open car door, making lifting, buckling and removing your baby quicker, safer and far more comfortable. Whether you're setting off on the school run or a long family journey, the one-hand rotation reduces awkward stretching and bending, helping to minimise strain on your back. Even when the Cloud G3 is reclined, the seat rotates effortlessly, providing convenient access while maintaining your child's comfort. Designed for everyday ease and maximum practicality, the Cybex Cloud G3 rotating infant car seat delivers a premium travel experience from birth while making every journey simpler for parents.
Advanced Linear Side-Impact Protection (L.S.P.) for Outstanding Safety
The Cybex Cloud G3 features the latest Advanced Linear Side-impact Protection (L.S.P.) System, engineered to provide exceptional protection during side-impact collisions. Working together with the energy-absorbing shell and specially designed height-adjustable headrest, the L.S.P. System helps reduce impact forces away from your baby, delivering up to 25% greater side-impact protection compared to the same seat without L.S.P. (based on internal testing). Designed for complete peace of mind, the automatic L.S.P. protectors deploy as soon as the Cloud G3 infant car seat is removed from the box, making installation quicker and easier with no additional setup required. When space is limited, such as in smaller vehicles or when multiple car seats are fitted, the protectors can be folded away while maintaining the seat's practical everyday usability. Combining cutting-edge safety technology with effortless convenience, the Cybex Cloud G3 sets a new benchmark for newborn car seat safety, giving parents confidence on every journey.
One Base. Four Years of Safer Travel
The CYBEX Base G3 is the foundation of the CYBEX G3 Modular System, providing one secure ISOFIX base for both the CYBEX Cloud G3 infant car seat and the CYBEX Sirona G3 360° rotating toddler car seat. Designed to grow with your child from birth to approximately four years (105cm), the Base G3 offers effortless one-click installation, an intelligent locking mechanism and visual installation indicators for maximum safety and convenience. Start with the Cloud G3 from birth to around 24 months, then seamlessly transition to the Sirona G3 using the same base, creating a flexible, long-lasting travel solution that combines award-winning safety, premium comfort and exceptional everyday practicality.
Cybex Sirona G3 Frequently Asked Questions
The Cybex Sirona G is suitable for children from approximately 3 months to 4 years (61–105cm) and supports a maximum weight of 19kg. It is designed to provide long-lasting comfort and protection as your child grows, making it an ideal next-stage car seat after the Cybex Cloud G or Cloud G3 infant carrier.
Yes. The Cybex Sirona G is designed to be used with the Cybex Base G, featuring ISOFIX installation and smooth 360° rotation for effortless access. If you're upgrading from the Cloud G or Cloud G3, you can continue using the same Base G, making the transition simple and cost-effective.
Yes. The Cybex Sirona G allows your child to travel rear-facing up to approximately 4 years (105cm), which is the safest way for young children to travel. It can also be used forward-facing once your child meets the minimum height and age requirements, in accordance with the user manual and current safety guidance.
The Cybex Sirona G and Sirona G Plus offer the same advanced safety features, 360° rotation, reclining positions and Base G compatibility. The only difference is the upholstery, with the Sirona G Plus featuring Cybex's premium Plus fabrics for a softer feel, enhanced breathability and a more luxurious finish.
Absolutely. The Cybex Sirona G is the perfect next-stage car seat after the Cybex Cloud G or Cloud G3. Both seats share the Cybex Base G, allowing you to continue using the same ISOFIX base while moving your growing child into a spacious 360° rotating toddler car seat with extended rear-facing capability.
As an authorised Cybex UK retailer, Chelsea Baby offers the latest Cybex Sirona G and Sirona G Plus car seats, expert product advice, competitive prices and fast UK delivery. Our experienced nursery specialists can help you compare models, choose the right fit for your vehicle and ensure you get the best rotating i-Size car seat for your family's needs.
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