Cybex Sirona S

Pre-order update: The Sirona S is arriving in stages, with most colours and Base S bundles expected from mid to late November 2026. Our lower-volume Style colours (Opal Blue, Quartz Pink, Jade Green and Off White) are being shipped from Cybex in Germany to fulfil pre-orders, so ordering now is the best way to secure yours. Dates are Cybex's latest estimates and may change, and we'll keep you updated until your seat is on its way.

The CYBEX Sirona S is a 360° rotating i-Size toddler car seat from the new CYBEX S-Line. Keeping your child rear-facing offers up to 50% better protection than forward-facing, and one-hand 360° rotation makes loading and unloading effortless. With linear side-impact protection and room to grow to around 4.5 years, it pairs with the Base S to complete the modular journey.

Why parents choose the Sirona S

• Rear-facing safety – rear-facing travel offers up to 50% better protection than forward-facing, with the shell distributing impact forces and holding your child close, right up to approx. 4.5 years.
• Grows up to 4.5 years – CYBEX GrowTech adapts with your child (40–105 cm with the newborn inlay accessory), AGR-certified for ergonomics with an adjustable headrest, M-position and 40% more recline range.
• Use from birth – removable inlays mean it works from day one; the Comfort inlay (included) supports your child up to 85 cm.
• One-hand 360° rotation – smooth rotation and a rigid crotch pad make placing and lifting your child simple and easy on your back.
• 25% more side-impact protection – the Linear Side-Impact Protection (L.S.P.) system folds out with a push and channels energy into the energy-absorbing shell and headrest.
• Magnetic belt holders – magnets hold the buckle tongues out of the way as you place your child in or lift them out.
• Optimal breathability – all-round ventilation and 3D mesh Style fabric keep your child cool and dry; SensorSafe is available for added peace of mind.
• XXL sun canopy (UPF50+) – a detachable canopy with breathable mesh window for sun protection on the go.

Approved to UN R129/04. Suitable from approx. 3 months to 4.5 years (61–105 cm, max. 20 kg; from birth with the newborn inlay accessory). Seat weight 7.3 kg.