Cybex | Sirona Si

• Up to 50% Higher Safety Levels¹
  Rear-facing car seat. Rear-facing travel is mandatory for the first 15 months and recommended for longer. With the Sirona Si, you can keep your little one safely rear-facing for the first 4.5 years, providing up to 50% better protection than forward-facing travel in a conventional car seat¹. The car seat shell acts like a protective shield, distributing impact forces and holding your child close.
  
  
• Made To Grow up to 4.5 Years Old
  CYBEX GrowTech with multiple height and recline positions. Adapt the Sirona Si as your child grows. Use it from birth with a separately available newborn inlay, while a removable comfort inlay supports larger babies. AGR-certified for enhanced ergonomics, the Sirona Si features an adjustable headrest and 40% more recline range in both rear-facing and forward-facing positions. The seat structure enables the hip-healthy M-position for your child.
  
  
• Easy Side Entry
  Fast on and off-boarding thanks to 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 Easy In crotch pad stays up for gentle, stress-free seating — quick and ergonomic for both parent and baby. 
  
  
• 25% More Side-impact Protection²
  Linear Side-impact Protection System. In a side collision, a three-tier safety system channels forces into the car seat’s energy absorbing shell and headrest, cutting them by up to 25%². The integrated Linear Side-impact Protection folds out with a simple push during set up and folds away neatly when space is limited.
  
  
• Ideal Sun Protection
  Integrated sun canopy. Only available with Style Models, an integrated XXL UPF50+ sun canopy³ protects your child’s skin and cuts glare for uninterrupted naps. A breathable mesh window boosts healthy airflow. The canopy is also detachable, helping you adapt for every season.
  
  
• Luxury Design for You and Your Child
  Chic leather optic detailing and mesh fabric. Inspired by the finest luxury car interiors, Platinum Style Models feature two-tone leather-look accents blending seamlessly with breathable mesh. The result is a sophisticated look for you and sumptuous comfort for your child. Available exclusively in Style models.
  
  
• Optimal Breathability
  All-round air ventilation with moisture regulation. A ventilated car seat shell helps keep your child cool and dry year-round. Exclusively available with Style models, an innovative 3D mesh fabric also regulates moisture absorption and boosts airflow up to six times compared to conventional fabrics.
  
  
• Hassle-free Holders
  Magnetic belt holders. As you get your child in or out of the Sirona Si, secure the buckle tongues to the sides of the seat with magnets. This keeps the seat belts neatly tucked away and makes on and off-boarding more effortless for both you and your child.
  
  
• For Use from Birth
  Double newborn inlay accessory with comfort inlay. Three removable inlays adapt the car seat as your baby grows. First, the Newborn Insert and Inlay support babies measuring 40 to 60 cm. These can then be removed, and your baby can stay supported by a soft Comfort inlay until they are 85 cm tall. (Newborn Insert & Inlay purchasable separately, Comfort Inlay included with the Sirona Si.) 
  
  
• Soft on Skin, Safe by Design
  Exceeds regulatory testing standards. 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. Tests are done by internal labs, and exceed regulatory testing standards in our markets.

• Safety Starts Rear-facing
  Keep your little one safe with the Sirona Si rear-facing car seat, featuring an integrated base unit. Designed for rear-facing travel up to 4.5 years, it delivers up to 50% better protection compared to a forward-facing travel position¹ and Linear Side-impact Protection for 25% more side collision safety². 360° rotation, an Easy-In crotch pad, and magnetic belt holders make on and off-boarding simple. Simply turn the seat towards the car door to get your child in or out, saving time and reducing back strain. Exclusive to Style models, an XXL sun canopy and elevated design combine safety and style.

• Sirona Si Toddler Car Seat with integrated base  
• Comfort Inlay
• User guide (Quick-start guide & digital guide access)
• Sun canopy (included with Style Models only)
• Please Note: Base S Adapter not included)

• Age range: From approx. 3 months up to 4.5 years (From birth with newborn inlay as an accessory)
• Child height: 61 - 105 cm
• Child weight: 20 Kg
• Approval regulation: UN R129/04

Dimensions

• Length: 560 mm
• Width: 450 mm
• Height: 540 mm
• Weight: 12.7 kg (Style Model) / 12.4 (Comfort Model)

• Fabric covers machine washable at 30° C

• Base S  
  The Sirona Si clicks on and off the Base S. This is installed using a load leg and ISOFIX. The Base S ensures safety and stability. Look for the i-Size logo in your vehicle to check compatibility.

Compatible with:

• Spare battery Car Seats
• SensorSafe Toddler Safety Kit
• Cup Holder
• Sirona S Line Summer Cover
• Sirona S-Line Newborn Inlay
• ISOFIX Guides
• Platinum Winter Footmuff Mini
• Snogga Mini 2

References:

¹ Compared to the same seat in a forward-facing position during a frontal impact. Based on internal test results

² Compared to the same seat without an L.S.P., based on internal testing.

³ Please Note: Mesh window is not UPF50+.