SKU: 32900305994
cybex sirona s i size

cybex sirona s i size Cybex® Car Seat Sirona Gi i-Size (9-18 kg) Comfort Magic Black

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Ships within 48 hours · Estimated delivery Jul 18 - Jul 23

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Description

cybex sirona s i size Cybex® Car Seat Sirona Gi i-Size (9-18 kg) Comfort Magic BlackUltimate comfort and safety, for their first four years. The rear facing Sirona Gi i Size has 360 rotation for easy boarding. All round air ventilation for cooler rides. Specifications: Age range: From approx. 3 months up to 4 years (from birth with newborn inlay) Child height: 61 105 cm (from 40 cm with newborn inlay) Child weight: Max. 20 kg Approval regulation: UN R129 03 Awards: 360 comfort and safety The latest car seat in our successful Sirona

Ultimate comfort and safety, for their first four years. The rear-facing Sirona Gi i-Size has 360° rotation for easy boarding. All-round air ventilation for cooler rides.

Specifications:

  • Age range: From approx. 3 months up to 4 years (from birth with newborn inlay)
  • Child height: 61 - 105 cm (from 40 cm with newborn inlay)
  • Child weight: Max. 20 kg
  • Approval regulation: UN R129/03

Awards:

   

360° comfort and safety

The latest car seat in our successful Sirona line is the most comfortable yet: the Sirona Gi i-Size, best in class* at the 05.24 ADAC / Stiftung Warentest. Rear-facing for safer travel, this car seat also features integrated Linear Side-impact Protection for defense from all directions. Upgrade your child’s comfort with 360° rotation for smooth on and off-boarding. All-round air ventilation keeps the ride cool – choose the Plus version for additional mesh and even more breathability. Five recline positions provide tailored comfort in either direction, for tiny newborns and fully-grown four-year-olds alike. 360° of comfort and safety for their first four years: the Sirona Gi i-Size.

Care instructions:

  • Fabric covers are machine washable at 30° C

Compatible with:

  • Car Seat Cup Holder
  • Sirona Gi i-Size Summer Cover
  • Sirona Gi i-Size Newborn Inlay
  • SensorSafe 4-in-1 Kit Toddler
  • ISOFIX Guides

Installation with base: Pay attention to the i-Size logo. If a vehicle seat is marked with this logo, it is suitable for use with all i-Size child seats and will therefore not appear in our list of compatible vehicles. If your vehicle does not have an i-Size seat, please check the compatibility of your vehicle. If your vehicle is not displayed, please contact our customer service team.

Up to 50% higher safety levels*

Rear-facing is one of the safest ways to travel. In the critical first moments of a front impact, the child's body is pushed against the padded car seat shell, minimizing movement and reducing the force acting on the child's neck. Mandatory up to 15 months (76 cm), we recommend keeping your child rear-facing for as long as possible. The Sirona Gi i-Size is designed for comfortable rear-facing travel until your child weighs 20 kg.​ (*compared to the same seat forward-facing in a frontal crash. Result of internal testing using 2022 ADAC frontal crash test criteria.)

Quick and easy onboarding

A stress-free start to your journey. Just swivel the car seat to face the car door and get your child onboard. You avoid back strain, while your child stays comfortable in any recline position.

Optimal breathability

Comfort in any season. All-round air ventilation lets air flow through channels in the car seat, carrying away heat and helping avoid a sweaty ride for your little one. The Plus version also includes mesh fabric that increases breathability up to six times compared to regular fabrics.

Side-protection

Integrated Linear Side-impact Protection defends your child against the force of a side impact. Working together with the energy-absorbing shell, the L.S.P. System significantly reduces the effect of impact force on the child.

Always in a comfortable position

Find the ideal recline setting, whether your little one is a newborn or a growing child. Five positions are available in both riding directions – and in the boarding position, too. And when your child falls asleep, you can recline the seat with one hand, letting them dream that little bit longer.

Grows with your child up to 4 years old

As your baby grows, adjust the Sirona Gi i-Size headrest for a comfortable fit at every stage. 12 positions allow a tailored fit to your child, with the harness lengthening automatically with each adjustment - and only one hand is required.

Easy onboarding

When you’re getting your child strapped into the car seat, you need all the help you can get. The Sirona Gi i-Size features ingenious loops designed to keep the harness out of the way as you get your child onboard. Switching from rear to forward-facing is just as easy.

Straightforward installation and anchorage

It only takes moments to set up your Sirona Gi i-Size. Use an ergonomic handle to click the ISOFIX into the vehicle seat and extend the load leg. Both provide stability and extra safety. Visual indicators help you confirm the seat is ready to protect.

Features:

  • i-Size Norm, UN R129/03
  • Height: 61 – 105 cm (from 45 cm with newborn inlay)
  • Weight: max. 18 kg
  • Age: approx. 3 months up to 4 years (from birth with newborn inlay)
  • 360˚ rotation mechanism
  • Rear-facing car seat
  • Advanced Linear Side-impact Protection
  • Energy Reduction Technology
  • One-hand recline function
  • Height-adjustable headrest
  • Energy-absorbing shell

Dimensions:

  • Length: 710 mm
  • Width: 440 mm
  • Height: 750 mm
  • Weight: 13 kg

What's included?

  • Sirona Gi i-Size toddler car seat
  • Integrated base
  • User guide
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: 32900305994

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4.3 ★★★★★
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Stephanie Vaughn
Cuba, US
★★★★★ 4
Product varies from package to package
Size: X-Large, Color: Black/Navy/Dark Purple/Red
Over a two year period this is my 4th purchase. They started as sleep shorts and have replaced other underwear most of the time because they are comfortable and the quality is pretty good. However there are differences in between every package. The length has varied up to an inch, the material has changed, and some are slightly tighter than others. That said it works for me. I am a side sleeper and sometimes the side seam bothers me.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 9, 2026
H
Verified Purchase
House of Squawk
Phoenix, US
★★★★★ 5
Very comfortable in the Texas heat.
Size: Small, Color: Black/Navy/Dark Purple/Red
I got some of these as a gift and I loved them so much I purchased two more packs. I just opened my new packs and put them in the washer so I'm not leaving a photo. When I wear them they look exactly like they do on the models. I've been doing a lot of heavy outdoor work in the heat and I get drenched. These underwear have a 100% cotton crotch and the rest is 95% cotton and 5% spandex. When I first saw the wide crotch I didn't think I would like it. But these are soooo comfortable. I'm 4'11" and weight 108-112 and the size small fits loosly but well. I could probably get away with an XS but I like this loose and not too tight fit. I see some folks say these roll up. They don't roll up on me. I think they might roll if they were tight fitting. I have lots of other undergarments like these and some roll and some don't. But none of the others are cotton. They are mostly spandex and since I've found these in cotton that's all I'm wearing until summer is over. I can't feel them or see them under pants or skirts. These look more like shorts than underwear and they have a very nice thickness. Since I only had four pair to begin with, those got washed and dryed a lot. I can't tell if they shrunk since I only tried them after washing. Sorry I forgot to compare the size of the new ones to the older ones before I threw them in the washer. I'll probably buy another set and compare at that time. One thing I can report is that they do not fade at all. I just washed the black, purple and red colors with the white color and the white is still completely white. Now I have more colors and I'll probably be walking around in my underwear and no one will know. The only con I can think of is the wide crotch wouldn't work well with pads with wings, in my opinion. Try a size larger for a nice cool pair of sleeping shorts to see how they fit while they are on sale. Then go smaller if needed. I think you might enjoy these.
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Reviewed in the United States on July 10, 2024
S
Verified Purchase
Shannon
San Leandro, US
★★★★★ 5
So comfortable and worth the buy
Size: Large, Color: Black
So comfortable!!! There is no seam in the butt and under neath, only in the front but it is really soft and non irritating. I got these for post partum but I’m already wearing them at 8.5 months pregnant. They’re probably my favorite undies right now. The length is also perfect and the material is very soft and stretchy. The waist band is the same, soft and stretchy.
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Reviewed in the United States on April 11, 2026
J
Verified Purchase
Jeanne
San Leandro, US
★★★★★ 3
Cotton Blend Was Just Too thick
Size: 3X-Large, Color: Black
I was surprised by how thick these boxers were, thicker than my jeans, much thicker than my PJs! Thick enough that I could wear them outside the home without jeans. In spite of the thickness, they were soft and very comfortable. The 3XL is a perfect fit on my 5’2” apple shaped, short waisted 215 lb body. The boxer cut helped prevent chafing, a major plus. Menstrual pads, with or without wings, do not adhere to this material, a major minus. Ultimately, feeling like I was wearing jeans to bed or wearing two pairs of pants outside the home, was just too uncomfortable for me. So disappointed because these boxers were such a great and comfortable fit.
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Reviewed in the United States on April 4, 2026
C
Verified Purchase
Charlie Horse 75
Lake Worth, US
★★★★★ 5
Great fit!
Size: Large, Color: Beige
Most comfy undies THANK YOU!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 22, 2026

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