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Description
siege auto cybex sirona 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
4.5 ★★★★★
Based on 27 reviews
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Product Reviews
★★★★★ 3
Nice for cooling but not so cool with staying on the bed
Color: Black Pinstripe, Size: King(108"x90")
Definitely cooled while sleeping however due to the silky fabric it did not stay on the bed and often ended up on the floor by morning.
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Reviewed in the United States on May 7, 2026
★★★★★ 4
Pretty nice blanket
First off I have to say that this is not exactly a cooling blanket. It is true that when you first get under it, it does feel cool. Shortly thereafter though, wherever the blanket makes contact with you it warms up to your body temperature, so it doesn’t remain cool. Still, I just moved my foot to a different area and hit a cool pocket, so it has its moments. I have to say I really like the weight of this blanket. It’s so hard to find a good blanket, that is not that thick, It is thin, which is exactly what I was looking for since I live in Florida. One side of the blanket is the “cooling“ side which is plain gray, and on the other side is a gray and white striped pattern. I’m not really crazy about the pattern to be honest. I wish this blanket came in more colors or patterns. The blanket fit my queen bed nicely - not too big or too small. For what it is, I’m not really sure I would say it’s good value for the money, but I do like this blanket.
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Reviewed in the United States on March 20, 2026
★★★★★ 5
Surprisingly, effective cooling blanket
When I first saw this cooling blanket available, I grabbed one right away. I had purchased a cooling blanket for my grandfather last summer that was fantastic but very expensive, so I was curious whether this one would actually compare considering the price difference.
Right out of the package, I could immediately feel that it was different from a normal comforter. The fabric itself feels noticeably cool when you touch it, which honestly caught me off guard in a good way.
The gray version I have features a striped design on one side and a solid gray color on the reverse. I love that it isn’t just plain white like so many cooling blankets tend to be. The pattern adds some visual interest while still matching pretty much any bedroom setup.
The fabric is incredibly soft and smooth against the skin. The brand says it’s made with Ice Toweling technology fabric, which supposedly works by absorbing body heat through the fibers’ molecular structure. I’m not totally sure how that works scientifically, but I can definitely tell you the result is real because the blanket does feel cooler when you sleep under it.
Something else I appreciate is that despite being silky smooth, it doesn’t constantly slide off the bed. I was expecting it to behave like a satin sheet, but it actually stays in place surprisingly well and its true to size.
Cleaning is straightforward. They recommend air drying the blanket to preserve the cooling fibers, which seems like a reasonable precaution. I would probably treat it like a delicate fabric just to keep it in good shape long term.
All things considered, I’m really impressed with this blanket. It’s soft, comfortable, genuinely cooling, and a great value compared to some of the pricey alternatives out there. If you tend to overheat while sleeping, this is definitely worth considering.
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Reviewed in the United States on March 9, 2026
★★★★★ 5
Superb Product
Color: White, Size: Queen
Wonderful and well made product. It's cool & comfortable and has helped relieve my back pain for a better night's sleep. So glad I bought it!
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Reviewed in the United States on May 21, 2026
★★★★★ 5
Not firm.
Color: White, Size: Queen
This mattress topper is not firm. So it doesn’t really fluff up to 3 inches. More like inches.
But when you lay on it ,it’s like so soft and comfortable. It makes you feel so cozy. I plan on ordering a second one for more cushion.
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Reviewed in the United States on May 29, 2026