cybex eternis s sensorsafe all-in-one car seat CYBEX Eternis S SensorSafe All-in-One Convertible Car Seat
SKU: 15552718667
cybex eternis s sensorsafe all-in-one car seat

cybex eternis s sensorsafe all-in-one car seat CYBEX Eternis S SensorSafe All-in-One Convertible Car Seat

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Description

cybex eternis s sensorsafe all-in-one car seat 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.
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SKU: 15552718667

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Karen W.
Pawtucket, US
★★★★★ 5
Soft and light
Color: A.Orange+Blue+Green
My doxie loves them
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 26, 2026
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Sara
Fort Morgan, US
★★★★★ 5
Squeaky Spiky Ball (Submitted by OG, The Conqueror)
Size: 4.5 Set of 4
FIVE OUT OF FIVE PAWS. THIS IS THE GREATEST BALL EVER MADE. My name is OG, and I am a machine built for destruction. For years, I have systematically dismantled every supposed "heavy-duty" toy that dared cross my path. They all fail. They all surrender. But this Spiky Ball? This is my worthy adversary. This is The One. If you have mighty jaws like mine, this isn’t just a toy—it’s a commitment. The Aesthetics & Grip (5/5 Jaws) This ball is bright orange. This is important because it means my Dog-Parent cannot pretend they don't see it when I drop it, covered in drool, directly on their laptop. The spikes are the best part. They are not soft and pointless like some other toys. These spikes dig right into my gums. It's the perfect texture for a serious, focused chew session. Whether I'm running full-speed or we are locked in a heavy-duty Tug-of-War, those spikes give me the grip I need to apply maximum rotational torque. This ball never slips. It demands I bring my A-game. The Squeak: My Personal Battle Horn (5/5 Ears) The volume on this thing is set to LEGENDARY. They say a quiet dog is a happy dog. WRONG. A loud dog is an active, conquering dog. The squeak is sharp, loud, and glorious. It's not a gentle little peep—it's a declaration. When I hear it, I know the hunt is on. More importantly, when I make it squeak, the humans instantly know I require attention, praise, or the immediate launch of the ball across the yard. It is the best attention-getter I own. Durability: Unstoppable Force Meets Immovable Object (5/5 Eternal Glory) This ball is a mystery. It has no discernible weaknesses. I have performed the full Pitbull Destruction Protocol on this Spiky Ball every day for weeks: The Gnaw: Prolonged, focused effort to crack the surface—(Failure. It laughs.) The Shake: Head-whipping force designed to dislocate any internal components—(Failure. The squeak remains.) The Backyard Abandonment: Left in the rain and dirt for maximum entropy—(Failure. Still orange.) Most toys are a snack. This toy is a lifetime project. It truly is built for aggressive chewers, and I respect that. It is the only toy that challenges me. Recommendation If your dog is serious about their job (chewing, fetching, and being loud), you must buy this. It is the only thing that stands up to my power. It’s loud, it’s spiky, and it’s the best. Go buy it now, and tell them OG sent you. OG, currently performing a full-body gnaw and shake, signing off.
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Reviewed in the United States on November 11, 2025
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nolly
Battle Creek, US
★★★★★ 5
Excellent product
Size: 4.5 Set of 4
Our service dog Max (named after Max Muncy 3rd baseman for the Dodgers) lives these balls. They are a sturdy product. Just what we needed for our Max.
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Reviewed in the United States on May 26, 2026
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J. Campbell
Charlottesville, US
★★★★★ 5
Best squeaky ball for the buck!!
Size: 4.5 Set of 4
my 90lb Pit, LOVES these balls.. and they have been lasting for months!! The squeaker is ok, those are lasting a week or two.. but that's better than average for my guy. At $4 a ball in the 4 pack, it's a great deal for a dog that loves a new toy every month .. I give him one at a time, the 4 pack lasts for many months of fun.
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Reviewed in the United States on March 4, 2026
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Amazon Customer
Lowell, US
★★★★★ 5
Durable and Fun!
Size: 4.5 Set of 4
My dog LOVES these balls and barks with excitement when the box arrives. These balls are super durable and a great size that does not allow them to roll under cabinets and sofas.
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Reviewed in the United States on March 28, 2026

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