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Description
cybex sirona s sensorsafe 2.1 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
4.6 ★★★★★
Based on 8 reviews
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Product Reviews
★★★★★ 5
Most comfortable panty!
Color: (6 Pack) Neutral, Size: XX-Large
When I saw them I was skeptical about the size I should order. At 225 lbs with a blessed backside, a 1X did not seem like the way to go, so I ordered a XXL. That was definitely a good choice. They fit comfortably well with a little breathing room. Love them!
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Reviewed in the United States on May 3, 2026
★★★★★ 3
Just okay, not a fan
Color: (6 Pack) 2-black 2-beige 2-white, Size: Medium
These run a bit large and are very stretchy. They are comfortable with zero tummy/hip support. I’ll wear them in certain circumstances, but would probably not purchase again. I don’t recommend.
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Reviewed in the United States on May 22, 2026
★★★★★ 4
So comfortable!
Color: (3 Pack) Skin, Size: Large
These boyshorts are so comfortable. I'm really glad I got them. This is actually the second order I've gotten. I ordered them before & got a size larger. The seller was so kind in making the exchange. Originally, I went to return them via Amazon & was told that I couldn't exchange them & that I had to return them. After sending a note to the seller I received a very nice message back from the seller & he sent me the smaller size. I was very grateful, especially because they'd been on sale when I first purchased them & they were no longer on sale, so repurchasing them would have cost more. I highly recommend this seller. It means a lot to me to be able to work with a merchant who is customer-centered & was willing to work with me in getting the right size.
The underwear is made from the softest, silkiest fabric. Seams are heat fused, so they don't have the typical ridge where the seams are located & they don't show through your clothing. The crotch portion is a bit odd. The cotton panel goes side to side, rather than front to back. I'm sure they're designed that way because it's more efficient to make them that way, but they don't accommodate a pantiliner very well. Since pantiliners are attached front to back, you have to attach it to the fabric of the panties in front & back, rather than have it attached to the liner itself. The crotch has regular fabric on the outside & a piece of cotton on the inside. The two fabrics aren't always well matched, so sometimes the outer fabric is rumpled because it isn't flat against the cotton liner. I took off a star for that.
That said, these are the most comfortable underpants I've ever worn. This style is not designed with tummy control, just so you're aware. I didn't want tummy control because I find it uncomfortable. It conforms nicely to my bumps & bulges. LOL.
They are so smooth & soft. Clothing slides over them effortlessly. Honestly, you can barely tell that you're wearing them. They wash beautifully with no need for special treatment. I just throw these in the washer & then the dryer afterward. When you pull them out of the dryer, they beautifully smooth & wrinkle-free.
As I mentioned above, this was my second order of these. After putting on those I first purchased, I knew I wanted more & I'm glad I got them. They're so comfortable to wear & are not visible through your clothing. I'll be back for more when I need some.
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Reviewed in the United States on February 16, 2025
★★★★★ 5
Just what I was looking for
Color: (6 Pack) 2-black 2-beige 2-white, Size: XX-Large
Finally, a pair of boy shorts that fit well, have a gusseted crotch and are so comfortable. I hope they keep making these because they are great.
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Reviewed in the United States on April 30, 2026
★★★★★ 5
Buy them!
Color: (6 Pack) 2-black 2-beige 2-white, Size: Large
Better than I was expecting! Its hot and humid here, while also being windy, so wearing sundresses is necessary, but scary. Lol These cover everything and are so silky soft. They're also stretchy enough for you to not feel like you're wearing anything at all. So comfortable. 10 out of 10.
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Reviewed in the United States on May 6, 2026