The Cybex Sirona S i-Size 360° car seat is a premium rear-facing solution designed to keep your child safe and comfortable from birth up to 4.5 years old. This innovative seat combines advanced safety technology with thoughtful design features that make parenting easier, offering up to 50% better protection in frontal impacts compared to forward-facing use, along with 25% enhanced side-impact safety through Linear Side-Impact Protection.
Safety Features
- Rear-facing design mandatory until 15 months, then usable up to 4.5 years
- Energy-absorbing shell that distributes impact forces effectively
- Linear Side-Impact Protection (L.S.P) with integrated three-tier safety system
- Rigid crotch pad for secure positioning
- Impact-tested and compliant with UN R129/04 regulations
- Screened for harmful substances including heavy metals, phthalates, and flame retardants
Adaptive Growth System
The Sirona S features Cybex GrowTech technology, which adapts as your child grows. The seat accommodates children from 40 to 105cm (approximately 3 months to 4.5 years), with optional newborn inlay and insert accessories for use from birth. The adjustable headrest, M-position functionality, and 40% extended recline range ensure ergonomic support at every stage. The included comfort inlay provides cushioning and support for younger children, whilst removable components allow customisation as your child develops.
Ease of Use
- Smooth one-handed 360° rotation reduces parental strain during child placement
- Magnetic belt holders keep safety straps neatly organised and accessible
- Simple setup with integrated L.S.P that folds out easily
- Lightweight design at 7.3kg for convenient installation
Comfort and Climate Control
Optimal breathability is maintained through all-round air ventilation and innovative 3D mesh Style fabric that boosts airflow up to 6 times compared to conventional materials. The ventilated hard parts work together to keep your child cool and dry throughout the year. An XXL integrated sun canopy with UPF50+ protection shields from harmful rays and reduces glare, whilst a breathable mesh window maintains air circulation. The canopy features convenient clips for easy detachment when needed.
Premium Design
This Style variant features sophisticated two-tone leather-look accents inspired by luxury car interiors, blending seamlessly with breathable mesh for a refined appearance. The chic Sepia Black colouring provides both aesthetic appeal and practical durability for everyday use.
Specifications
- Child height range: 61-105cm (40-60cm with newborn inlay)
- Maximum child weight: 20kg
- Suitable age: Approximately 3 months to 4.5 years (from birth with newborn inlay accessory)
- Product dimensions: 56cm (L) x 45cm (W) x 55cm (H)
- Product weight: 7.3kg
- Compliance: UN R129/04, AGR-certified for enhanced ergonomics




























