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Description
cybex sirona car seat base Cybex Sirona S SensorSafe Convertible Car Seat – Twinkle Twinkle Little OneThe CYBEX Sirona S is the ONLY convertible car seat to feature a 360 swivel seat with a load leg, linear side impact protection, and SensorSafe technology. Built into the chest clip, SensorSafe provides real time in app alerts when potentially unsafe situations arise including if a child unbuckles the chest clip, if the back seat becomes too warm or too cold, and if the driver unintentionally leaves the child behind. These features offer advanced
The CYBEX Sirona S is the ONLY convertible car seat to feature a 360° swivel seat with a load leg, linear side impact protection, and SensorSafe technology. Built into the chest clip, SensorSafe provides real-time in-app alerts when potentially unsafe situations arise including if a child unbuckles the chest clip, if the back seat becomes too warm or too cold, and if the driver unintentionally leaves the child behind. These features offer advanced safety protection for children and greater peace of mind for parents.
- ONE-HAND 360° SWIVEL SEAT: For easy loading and unloading of your child
- LOAD LEG: Absorbs energy and reduces crash forces on the child by up to 30% in a front impact collision*
- ONE-TIME VEHICLE BELT INSTALLATION: Allows seamless transition from rear-facing to forward-facing mode without having to re-install
- EASYLOCK™ BAR: Reduces force needed up to 4x for quick, simple and secure installation
- SENSORSAFE TECHNOLOGY: Bluetooth enabled chest clip sends mobile app alerts if a child unbuckles the chest clip, if the back seat becomes too warm or too cold, and if the driver unintentionally leaves the child behind
- 12-POSITION ON THE FLY RECLINE: Adjust even when the seat is in use
- LINEAR SIDE-IMPACT PROTECTION (L.S.P.): Reduces collision forces by up to 25% in a side impact crash*
- ANTI-REBOUND BASE: Reduces rebound forces in a rear or front impact crash
- REAR-FACING LONGER: Up to 50 lbs.
- MAGNETIC BUCKLE HOLDERS: Keeps harness out of the way for easy loading and unloading of your child
- DISHWASHER SAFE CUP HOLDER: Can be positioned on either side of seat
- 12-POSITION ADJUSTABLE HEADREST: Harness adjusts with the headrest for a proper fit as your child grows
- DUAL-LEVEL INDICATORS: Clearly indicate the proper car seat angle from either side of the seat
- STEEL REINFORCED FRAME: Provides strength and durability
- 3-POSITION PADDED BUCKLE: Allows for a secure fit while providing extra comfort for your growing child
- REMOVABLE INFANT INSERT: Ensures proper fit and support for babies
*As compared to the same car seat without this feature
Usage
- Child Age Minimum: newborn
- Child Age Maximum: 8 years
- Child Weight Minimum: 4 lbs.
- Child Weight Max: 65 lbs.
- Rear-Facing Mode Weight Limitation: 4-50 lbs.
- Rear-Facing Mode Height Limitation: 17"-49"
- Forward-Facing Mode Weight Limitation: 22-65 lbs
- Forward-Facing Mode Height Limitation: 28-49 in
- Forward-Facing Mode Age Limitation: at least 22 lbs
- Forward-Facing Mode Fit Limitation: top of ears below the top of the headrest
Specifications
- Dimensions: 24.5"D x 19"W x 25.5"H
- Weight: 30.4 lbs.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- 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
4.1 ★★★★★
Based on 24 reviews
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Product Reviews
★★★★★ 5
Better quality than the others!
Size: 10.5, Color: Dark Black, Size: 10.5, Color: Dark Black
I’ve had a pair of these in grey for over a year and was looking for black shoes to replace my worn out old ones, so I decided to give these a try.
Just like the grey, these did not disappoint. They have a different/look design than the standard breeze/cole haan knockoffs you see everywhere. They look and feel a lot better. The insoles have more support and the outer sole is very cushioned, making them comfortable all day.
With the other knockoffs, I usually buy an additional insole for support since they come with a laughable sponge laid in the shoe, which is an added expense. This alone makes the SVNKE a great option.
If you like the different look of these, then definitely get them, you will appreciate the higher quality!
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Reviewed in the United States on April 27, 2026
★★★★★ 5
Fantastic purchase
Size: 12.5, Color: Black
Fantastic purchase. I had a trip to Spain planned and wanted shoes that would work both for lots of walking and also more dressy events so I bought these. After a nine day trip to Spain, walking over 20,000 steps a day through cobble stone streets I can report these shoes held up, were comfortable, gave no blisters, and all with virtually no break in time for the shoes. I wear a size 12 but bought a half size larger and it was a perfect fit. Definitely recommend these.
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Reviewed in the United States on April 10, 2026
★★★★★ 5
If you’re going for cushion and looks, these do it.
Size: 9.5, Color: Grey
These are massively cushiony. They fit as sized, slip on well, and look very good. It seems like they should hold up well.
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Reviewed in the United States on April 28, 2026
★★★★★ 3
Nice and affordable, but poor arch support and mushy insoles.
Size: 11 Wide, Color: Black
These shoes look nice and feel comfortable at first, but the soft memory foam type bottoms on these don't provide enough support. I am a big guy and find that over the course of the day the insoles compress and my feet end up at an angle. After a long day on my feet, my dogs are barking and my leg muscles are tight I think from walking on an angle. I added my GoodFeet arch support and they help a little with arch support, but the insole is so soft that it absorbs the bulge quite a bit.
If you're skinny and need a decent looking pair of shoes on the cheap, they might be ok for you. I would not recommend long walks or strenuous activity in them. I will say they are lightweight, breathable and a decent value if you don't have flat feet and a beer belly (I don't even drink beer, how'd that happen, WTH?!)
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Reviewed in the United States on June 13, 2025
★★★★★ 5
Love the shoes.
I love these shows. Super cushioned and comfortable. Makes casual but professional dress so easy. Buying different color because I like them so much. They are true to size. Maybe a tad short in toe box.
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Reviewed in the United States on March 8, 2026