cybex all in one CYBEX Eternis S SensorSafe All-in-One Convertible Car Seat
SKU: 21485057405
cybex all in one

cybex all in one CYBEX Eternis S SensorSafe All-in-One Convertible Car Seat

Sale price$25.91 Regular price$28.79
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Ships within 48 hours · Estimated delivery Jun 30 - Jul 5

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Description

cybex all in one CYBEX Eternis S SensorSafe All-in-One Convertible Car SeatThe CYBEX Eternis S with SensorSafe is the only car seat your child will need from their first ride home through every carpool adventure. With its three adaptable modesrear facing, forward facing, and boosterthe Eternis S is designed to protect children from birth up to 120 lbs. Built with CYBEXs signature safety features and thoughtful design, it ensures unparalleled comfort and security for your little one at every stage. From its advanced Linear

The CYBEX Eternis S with SensorSafe is the only car seat your child will need from their first ride home through every carpool adventure. With its three adaptable modes—rear-facing, forward-facing, and booster—the Eternis S is designed to protect children from birth up to 120 lbs. Built with CYBEX’s signature safety features and thoughtful design, it ensures unparalleled comfort and security for your little one at every stage. From its advanced Linear Side-impact Protection (L.S.P.) to the intuitive SensorSafe™ technology that monitors your child’s well-being, this car seat provides peace of mind wherever the road takes you.

What Is SensorSafe? Keeping Your Child’s Safety Front and Center

Equipped with SensorSafe™ technology, the CYBEX Eternis S delivers real-time safety alerts directly to your phone via the SensorSafe app. This innovative chest clip tracks critical safety indicators, such as unbuckling, temperature, and even periods of inactivity, helping you ensure your child’s safety without taking your eyes off the road.

Cybex Eternis S SensorSafe All-In-One Convertible Car Seat Features

3-in-1 Versatility: Switch between rear-facing (4-50 lbs.), forward-facing (22-65 lbs.), and booster (40-120 lbs.) modes to accommodate your child’s growth.
SensorSafe Technology: Safety alerts for peace of mind, including temperature and child unbuckling notifications.
Linear Side-Impact Protection (L.S.P.): Absorbs up to 25% more impact forces in a near side-impact crash.
12-Position Height-Adjustable Headrest: Grows with your child, making adjustments easy with no need to rethread the harness.
Internationally Patented 3-Position Reclining Headrest: Keeps your child’s head in a safe, comfortable position, reducing the risk of forward head slump.
In-Seat Recline and 6-Position Seat Recline: Designed for ergonomic support and extra legroom in the rear-facing position.
Magnetic Buckle Holders: Allows for easy seat entry and exit without searching for the buckle.

Cybex Eternis S SensorSafe All-in-One Convertible Car Seat Weight and Height Limits: How Long Can You Use Cybex Eternis?

Designed to grow with your child, the Eternis S supports rear-facing up to 50 lbs. or until your child reaches 48 inches, forward-facing up to 65 lbs., and then transitions to a high-back booster for children up to 120 lbs. This extended lifespan means your child can enjoy the safety and comfort of the Eternis S for up to 10 years.

Is CYBEX Eternis FAA Approved?

Yes, the CYBEX Eternis S is FAA-approved for air travel, ensuring your child’s safety in-flight. The FAA recommends securing children in an approved child restraint during flights for additional safety during unexpected turbulence. As always, please confirm with your airline before departure and refer to the car seat’s manual for aircraft installation instructions.

Cybex Eternis S SensorSafe All-In-One Convertible Car Seat Manual and Instructions for Installation

Installing the Eternis S is straightforward with CYBEX’s clear, detailed instructions, and it offers LATCH compatibility for secure installation. For a perfect fit and peace of mind, refer to the user manual for guidance on latch, tether, harness, and recline limitations for each mode.

Cybex Eternis S SensorSafe All-in-One Convertible Car Seat Reviews: Why Parents Love It

The CYBEX Eternis S with SensorSafe has received high praise from parents and caregivers who appreciate its seamless blend of safety, comfort, and durability. Many users highlight the SensorSafe technology, noting that it provides an added layer of security, especially for longer drives or busy days. Parents also love the versatile design, allowing them to use one seat for all stages of their child’s growth—from birth up to 10 years. The seat’s sturdy steel-reinforced frame and the unique L.S.P. system are often mentioned in reviews as standout safety features that make parents feel confident in their choice.

Another common highlight is the ease of use. Parents appreciate the adjustable headrest, easy recline options, and magnetic buckle holders, which simplify getting children in and out. Overall, the Eternis S offers long-term value and trusted safety, making it an exceptional investment in your child’s travel safety.

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Shipping Notes
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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]
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SKU: 21485057405

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Andy
Dallas, US
★★★★★ 5
Perfect supportive soft pillow
Size: Queen (Mid Loft), Number of Items: 1
The perfect pillow that is hypoallergenic. It’s soft but your head doesn’t sink through. Supportive and soft at the same time. Have bought more pillows.
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Reviewed in the United States on March 5, 2026
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Jennifer Whitehurst
Omaha, US
★★★★★ 3
Very firm pillow
Size: Queen (Mid Loft), Number of Items: 1
I'm not sure I received the same pillow as advertised. The pillows I received are extremely firm. I would not classify it as medium. It was also not covered by a cotton case. it had a very sheer gauze like material covering the latex.
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Reviewed in the United States on January 28, 2026
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Madison Swanson
Alexandria, US
★★★★★ 5
Super springy and comfy!
Size: Queen (Mid Loft), Number of Items: 1, Size: Queen (Mid Loft), Number of Items: 1
I’ve been looking for a pillow that offers support but is soft and cushy. I had never tried a latex pillow before, and I was skeptical because I heard it could be hard, but I decided to give it a try. I tried a memory foam and it was waaaaay too hard to be comfortable. This pillow retains its shape, is really soft and plushy, and works great for back or side sleeping. It had a slight smell (not unpleasant though) when we first unboxed it, but it was gone by day 2. The pillow also sprang up immediately on unwrapping it. After a few days it seemed a little bit bigger, but it didn’t really need any time to air out/fluff up, it was basically ready straight out of the box. I’m often picky about pillows because I get headaches from sleeping on my neck in the wrong way, but this one is great and I haven’t had a problem at all. My hubby likes it too :) it’s the favorite house pillow now.
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Reviewed in the United States on August 17, 2023
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L. Webster
Lowell, US
★★★★★ 5
Sleeping like a dream!
Size: Queen
We stayed at a Westin hotel recently and usually I don't sleep well when traveling but this overnight stay was heaven! I don't know what magic is in these pillows but they are a dream! I sleep in my side and these are perfect, I sleep the entire night with no back or neck issues. I've tried some expensive pillows from Sealy, Serta, etc, and nothing compared to the Westins! So glad these are available through the Westin Amazon store! And less expensive than anything else I've tried.
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Reviewed in the United States on June 23, 2024
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Suzanne H.
Birmingham, US
★★★★★ 2
Not the same as hotel pillows.
Size: King
Ordered this pillow after staying at a Westin hotel. I should have returned it because it seemed different from the pillow at the hotel. It feels worn out and doesn’t keep its shape. Would not recommend.
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Reviewed in the United States on October 28, 2025

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