CYBEX Sirona S i-Size 360° Car Seat – Sepia Black - Comfort

Keep your little one safe and snug with the Sirona S rear-facing car seat. Designed for rear-facing travel up to 4.5 years, it offers up to 50% better protection*, an energy-absorbing shell, and Linear Side-impact Protection for 25% more side-impact safety**.

One-handed 360° rotation, rigid crotch pad and magnetic holder for easy and simple onboarding. XXL UPF50+* sun canopy, adjustable GrowTech fit, and chic leather-look trim combine safety and style.

*Compared to the same seat in a forward-facing position during a frontal impact. Based on internal test results.

Compared to the same seat without an L.S.P., based on internal testing.

*Except for mesh parts

KEY FEATURES

REAR FACING SAFETY

Meet rear-facing travel at its very best; keep your little one safe and snug for the first 4.5 years with the Sirona S car seat. Its shell acts like a protective shield, cleverly distributing impact forces and holding your child close. With rear-facing mandatory until 15 months, it provides up to 50%* better protection until they turn 4.5.

GROWS UP TO 4.5 YEARS

CYBEX GrowTech is specially designed to ensure that the seat grows and adapts with your child. The standard comfort inlay provides added support, while the newborn inlay, available as an accessory, enables use from birth up to approximately 4.5 years (40–105 cm). AGR-certified for enhanced ergonomics, it features an adjustable headrest, M-position, and 40% more recline range in both rear-facing and more upright forward-facing positions**. Safe, comfortable, and designed to adapt seamlessly as your child grows.

USE FROM BIRTH

Three cleverly designed, removable inlays let you use the Sirona S car seat from Day 1. The Newborn insert and Newborn inlay are purchasable accessories and are necessary for measuring 40 to 60cm, giving them the extra head and body support they need for a safe, snug fit. When your baby is no longer a newborn but still small, remove the Newborn insert and inlay but keep the Comfort inlay until they are 85cm tall. This soft, adaptive layer cushions and supports them as they grow and is included with the Sirona S car seat.

360° ROTATION

Smooth one-handed 360° rotation eases the strain on parents’ backs when placing your child in or taking them out of the car from the side. The rigid crotch pad provides easy and simple onboarding — quick and ergonomic for both parent and baby.

25% MORE SIDE-IMPACT PROTECTION

Advanced Linear Side-Impact Protection is part of a three-tier safety system that cuts impact forces by up to 25%* by channeling energy into the car seat’s energy-absorbing shell and headrest. The integrated L.S.P folds out with a simple push during setup and tucks neatly away when space is limited.

MAGNETIC BELT HOLDERS

Clever magnets secure the buckle tongues to the sides of the Sirona S, keeping the belts neatly tucked away as you place your child in or remove them from the car seat. This streamlined entry creates a calm, effortless experience for both parent and child.

OPTIMAL BREATHABILITY

All-round air ventilation supports to keep the child cool and dry year-round. Innovative 3D mesh Style fabric that self-regulates moisture absorption, boosts airflow by up to 6x vs. conventional materials and ventilated hard parts guarantee optimal breathability and comfort. For extra peace of mind, Cybex offers SensorSafe, a child-in-car alert system that also monitors the car’s interior with an app that sends smartphone notifications.

SUN PROTECTION

XXL integrated sun canopy with UPF50+ shields your child from the sun, cuts glare for safer naps, and keeps skin protected on the go. Breathable mesh window boosts airflow for better air circulation. Made with clever clips, the canopy can be easily detached, giving you the flexibility to adapt for every season, every trip, and every family adventure. Available in style colours only.

SOFT ON SKIN

Because your child deserves the best start to life, our products are screened for harmful substances such as heavy metals, phthalates, flame retardants and other restricted chemicals before they reach you. Tests are done by internal labs and exceed regulatory testing standards in the markets we serve.

LUXURY DESIGN (STYLE VERSION ONLY)

Chic two-tone leather-look accents blend seamlessly with breathable mesh in the new Platinum car seat, inspired by the finest luxury car interiors. The result is a sophisticated, refined look for you and sumptuous, secure comfort for your child — style and substance in perfect harmony. Available exclusively in Style variants.

*Compared to a forward-facing seat without an airbag in a frontal crash, based on internal testing.

Compared to predecessor.

*Confirmed by ADAC in its article dated 10 June 2026, referring to car seats of this type.

Except for mesh parts

ADDITIONAL INFORMATION

PRODUCT DIMENSIONS: L 56cm / W 45cm / H 55cm

PRODUCT WEIGHT: 7.3kg

PACKAGING DIMENSIONS: Depth/Length - 74.5cm Width - 47.5cm Height - 42cm
Gross Weight - 10.8kg
Net Weight - 7.5kg

TECH SPECS: UN R129/04
Child Height: 61 - 105 cm (From 40-60cm with newborn inlay)
Child Weight: Max. 20kg
Age: From approx. 3 months up to 4.5 years
(From birth with newborn inlay as accessory)