SKU: 10868054381
cybex sirona age range

cybex sirona age range CYBEX Sirona G3 i-Size Rotating Toddler Car Seat

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Description

cybex sirona age range CYBEX Sirona G3 i-Size Rotating Toddler Car SeatCYBEX Sirona G3 i Size 360 Rotating Toddler Car Seat Rear Facing to 4 Years The CYBEX Sirona G3 i Size is a 360 rotating toddler car seat designed to keep children travelling rear facing from approximately three months up to four years old, and from birth with the optional double newborn inlay accessory (sold separately). Certified to UN R129 04 and holding both an AGR back health seal and a Red Dot Award, the Sirona G3 combines proven safety

CYBEX Sirona G3 i-Size 360° Rotating Toddler Car Seat - Rear-Facing to 4 Years

The CYBEX Sirona G3 i-Size is a 360° rotating toddler car seat designed to keep children travelling rear-facing - from approximately three months up to four years old, and from birth with the optional double newborn inlay accessory (sold separately). Certified to UN R129/04 and holding both an AGR back health seal and a Red Dot Award, the Sirona G3 combines proven safety engineering with the kind of everyday practicality that makes a genuine difference across thousands of car journeys.

Up to 50% Higher Safety Levels Rear-Facing

The Sirona G3 is built around a straightforward but important principle: rear-facing travel is significantly safer for children than forward-facing. In a frontal collision - by far the most common type - a rear-facing seat's padded shell absorbs and distributes impact force across the child's back, shoulders, and head, rather than placing that force through the harness straps alone. CYBEX's internal testing shows that the Sirona G3 used rear-facing delivers up to 50% better protection compared to a conventional forward-facing seat. UN R129/04 (i-Size) regulations require all children to travel rear-facing until at least 15 months, and we strongly recommend continuing in the rear-facing position for as long as the seat allows - up to 105 cm in height, or approximately four years old.

360° Rotation for Effortless Boarding

One of the most challenging aspects of daily travel with a toddler is getting them settled in their seat without awkward lifting, twisting, or straining your back across the car door frame. The Sirona G3's 360° rotation resolves this directly. Rotate the seat to face the door, secure your child in comfort, then swing the seat back into the travel position. The rotation works in all recline positions, so you never need to adjust the recline angle before you can rotate - particularly useful when you have a sleeping child to move. The same smooth process applies when you arrive at your destination.

Advanced Linear Side-Impact Protection (L.S.P.) - 25% More Protection

The Sirona G3 features CYBEX's Advanced L.S.P. System, which deploys automatically when you first take the seat out of its packaging - no setup required. The energy-absorbing wings combined with a specially designed headrest reduce the force of a side collision by approximately 25% compared to the same seat without L.S.P. (based on internal testing). If space is limited - for example when fitting three seats across a rear bench - the inner L.S.P. wing can be folded away, though CYBEX recommends always keeping the door-side wing extended for maximum protection.

AGR-Certified Ergonomic Comfort

Holding the AGR Seal of Approval from Germany's independent back health organisation, the Sirona G3 is designed to support healthy posture throughout your child's development. The M-position keeps legs and hips correctly supported, aiding hip joint development over the months and years of use. A height-adjustable headrest grows with your child, and five recline levels - available in both rear-facing and forward-facing orientations - mean you can always find a comfortable, well-supported position whether your child is awake and alert or napping mid-journey.

Practical Details That Make a Difference

Belt holders keep the harness straps neatly out of the way when you're settling your child into the seat - a small detail that significantly reduces the fuss of getting a wriggly toddler buckled in. All-round ventilation keeps the seat environment comfortable across longer journeys and warmer days, with Plus Line versions adding a premium mesh fabric six times more breathable than conventional cover materials.

Part of the CYBEX G3 Modular System

The Sirona G3 is part of the CYBEX Modular G3 family, and fits onto the same CYBEX Base G3 as the CYBEX Cloud G3 infant car seat. If you started with the Cloud G3 from birth, transitioning to the Sirona G3 requires no new base purchase - it clicks onto the existing Base G3 in a single step, supported by ISOFIX connectors and a load leg for a stable, secure fit. Together, the three products form a complete birth-to-four-years solution; you can find the full set in our CYBEX G-Line Car Seat Bundle.

Please note: the Sirona G3 requires the Base G3 for installation in all vehicles. Unlike the Cloud G3, it cannot be secured using a vehicle seatbelt alone. Always verify compatibility using CYBEX's Car Compatibility Checker before purchase.

Visit our Dunfermline showroom to see the full CYBEX G3 Modular System in person, or browse our complete CYBEX car seats collection online.

Cybex Sirona G3 Specifications

Specification Detail
Standard UN R129/04 (i-Size)
Age range From approx. 3 months to 4 years
Age range with newborn inlay From birth (inlay sold separately)
Child height 61–105 cm
Child height with newborn inlay From 40 cm
Child weight Max. 19 kg
Seat weight 6 kg
Weight with Base G3 13 kg
Dimensions L 710 mm / W 440 mm / H 750 mm
Packaging dimensions L 71 cm / W 46 cm / H 38 cm
Gross packaged weight 8.1 kg
Net weight 6.4 kg
Recline positions 5 (rear-facing and forward-facing)
Side-impact protection Advanced L.S.P. — approx. 25% reduction vs. same seat without L.S.P.*
Rear-facing safety improvement Up to 50% vs. conventional forward-facing seat*
Installation ISOFIX + load leg via Base G3 (required; sold separately)
Belt-only installation Not available — base required in all positions
Forward-facing Permitted from 15 months and min. 76 cm
Aircraft approved No
Compatible base CYBEX Base G3 / Base G
Compatible infant seat (same base) CYBEX Cloud G3
Fabric care Machine washable at 30°C

*Based on CYBEX internal testing.

What's in the Box

  • CYBEX Sirona G3 toddler car seat
  • User guide

Base G3 and double newborn inlay accessory sold separately.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 10868054381

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Christopher
Natrona Heights, US
★★★★★ 5
The Perfect Sheets To Lie On While Writing Amazon Reviews
Size: Full, Color: Light Gray
As I write this, I am laying on an adjustable full sized bed by Hofish and a 10.5" comfort foam mattress by Classic Brands. I know I sound like I am an Amazon plant, but I swear I am not. I'm not even a stockholder anymore. This is the most awesome bed stylings combination I have had in many, many years. In fact, it is the best I have ever owned and it is beat only by some ritzy resort I stayed at on vacation like 20 years ago, though I admit I was pretty drunk the entire time so my memory might not be the most accurate. But getting back to today... these sheets are great. I washed them twice - I'm not a neat freak, I am just amazingly disorganized and easily distracted while doing laundry, so tonight they went though two wash cycles and one dry. And then I put them on the bed. While these sheets are not deep pocket sheets, they don't need to be with this mattress. There is enough room and border for them to tuck and wrap with the elastic to give a strong grip under the mattress, which is important as the adjustable frame continually put the sheets and mattress though its repeated adjustable calesthenics-type positioning. The other two sheet sets I have used since I got this bed have struggled poorly with this. In the day or so and at least a dozen position changes, these sheets stay in place with no popped corners to exposing the bowl as the head and feet rise. Of course, till will tell if it lasts, but so far they are the best of the batch of sheets in my closet. As for texture, they are awesome. I'm a dude. I don't really know what thread count or knit or whatever really means. But these sheets feel like a well-washed favorite, quality rock & roll concert t-shirt. And not one of these glitter puff stupid new groups, like a real rock band from the 80s that now charges $250 for a concert ticket and $60 for a t-shirt...but that group you saw back then, paid $10 for the shirt and you STILL have it and love to wear it because it is perfectly molded to your body, soft and reliable. The kind of shirt you will wear under your suit at work and just grin not just for mental middle finger to corporate dress codes, but because the t-shirt is just that great of a feeling. Well, that is what these sheets feel like. And now you get to sleep in it. It is that awesome. In LA right now we are having a nasty heat wave, but these sheets don't seem to bake me even with my stuttering AC. The flannel sheets I love seem to trigger the butt sweats as soon as I lay down in this heat, but no such problem with these. So really, I'm absolutely happy with these things. I am going to order more in other colors as soon as Amazon gets them back in stock. Great price, great quality, great comfort, great fit, great deal. It is that simple.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 3, 2017
M
Verified Purchase
Marellen Coley
Fort Morgan, US
★★★★★ 5
Soft smooth and wrinkle free!
Size: King, Color: White
The most comfortable sheets I’ve had in years! Soft and don’t wrinkle up in the bed. Some reviews said they are thin but I think they’re perfect! I don’t want super thick sheets as we are hot sleepers. These are the perfect feel. They also stretch very well to fit on my mattress all the way around and I have a thick mattress! My precious sheets were a struggle to get over the corners but these fit perfectly. Would buy 10 times over! Such a good value as well!
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Reviewed in the United States on April 14, 2026
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Verified Purchase
Justice
Omaha, US
★★★★★ 4
Soft Material, but Color Not as Expected
Size: Queen, Color: Oatmeal, Size: Queen, Color: Oatmeal
I did not open or use this sheet set because the color wasn’t suitable for the occasion I intended. I prefer to return items in unused condition so they can be resold as new, so I cannot comment on the exact fit. From a price point, it's value for money. From touching the fabric through the packaging, the material feels soft and of fair quality. There is no unpleasant smell, and the overall functionality seems fine based on its construction. My only disappointment is the oatmeal color—it looks somewhat dull and gives off an aged or slightly used appearance. I was hoping for a brighter, creamier tone. Aside from the color issue, the product appears to be well made and comfortable, which is why I’m giving it four stars.
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Reviewed in the United States on December 6, 2025
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Verified Purchase
Anonymous
Lexington, US
★★★★★ 5
Nice and soft
Size: Queen, Color: Chambray
Update: I’m very happy with this sheet set! I’m currently only using the fitted sheet as I don’t have a need for the top sheet or pillow cases right now. It hasn’t popped off the mattress at all like the previous cheep sheet I had. Original post: The sheet set arrived today. Haven’t actually tried it yet because I need to wash it first. From I can see, looks great. Once it’s washed and on my bed, and can figure out how to update my review I will do so accordingly. It’s soft like most people have said and the color is nice, though they didn’t have my favorite color purple in a shade I like so I got the ‘fancy blue’ (don’t remember the actual name of the color) because I desperately needed a new sheet of quality.
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Reviewed in the United States on March 1, 2026
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Verified Purchase
Donna A.
Grantham, US
★★★★★ 5
Very comfy sheets, nice fabric
Size: Full, Color: Oatmeal
I wasn’t expecting such good quality forthis price. They’re very soft, but of fairly thick fabric. I’m sleeping great on them. The pockets are deep enough for an 8” foam mattress plus my 3” topper. Will be getting another set for the second bedroom.
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Reviewed in the United States on April 13, 2026

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