SKU: 11022552689
cybex research institute

cybex research institute CYBEX Eternis S SensorSafe All-in-One Convertible Car Seat

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Description

cybex research institute 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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SKU: 11022552689

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4.6 ★★★★★
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M
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Mat Scott
Houston, US
★★★★★ 4
Good fit and comfort.
Size: 11.5 Women/10.5 Men, Color: 1o-506 Black
These fit well and are easy to wear in the water. They drain and dry quickly so you can move from wet to dry without having to change shoes. They kept my feet reasonably warm on a chilly day in the river. However the grip on the soles could be a bit better; they got pretty slippery when walking on rocks. They also don't offer much protection if you happen to step on something sharp. They're good if you need something versatile but I wouldn't recommend for serious river work.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 22, 2026
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Verified Purchase
Jess C.
Lake Worth, US
★★★★★ 5
Perfect for Cenotes – Lightweight, Quick-Drying & Comfortable
Size: 6 Women/5 Men, Color: 1a-407 White, Size: 6 Women/5 Men, Color: 1a-407 White
Perfect water shoes! The material is thin, but they dry very fast, which was exactly what I needed. I’m usually a size 6.5 and sized down half a size, and the fit was perfect. I used them for swimming and walking in cenotes in Mexico for about two and a half hours, and they were comfortable the entire time. Great grip and very practical!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 4, 2026
A
Verified Purchase
anitaj
Chelsea, US
★★★★★ 5
Great quality & comfortable all day wear
Size: 13.5 Women/12.5 Men, Color: 1e-414 Gradient Blue 35
I purchased these for my husband to wear on our vacation to Jamaica. I planned a trip to one of the many beautiful falls and water caves" in the area. The travel instructions stated we would be "climbing rocks & walking through fast moving water" and water shoes with good traction were advisable. The excursion was amazing and my husband was very impressed with the quality and durability of these water shoes. They kept his footing steady, kept him from slipping and were extremely comfortable for all-day day wear. We strongly endorse these water shoes for any water sport or easy summer wear.
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Reviewed in the United States on April 30, 2026
M
Verified Purchase
MJ15
Bozeman, US
★★★★★ 5
I would give these 6 stars if I could
Size: 7 Women/6 Men, Color: 1a-407 White, Size: 7 Women/6 Men, Color: 1a-407 White
We're going on a trip soon where we'll be jumping into some natural waterfalls and it is recommended that we wear water shoes. I've had water shoes before and so far not a fan. They're tight and ugly, making my feet look like a squishmallow (like rock climbing shoes). Searched on Amazon and saw these. Hey! The pics online actually looked pretty neat. They reminded me of those funny shoes with toes. I read the reviews and everyone said they were the most comfortable shoes ever. So, I drank the koolaid and bought a pair for me (white) and a pair for hubby (grey/green). We just tried them on..... So, I'm normally a size 7 (women's) and my feet are wide. For slippers, I fit into a 6. So I took a chance and ordered size 37 (which is honestly the normal EU size for me, but being that these are made in China, who knows what I'll get). Hubby is normally a size 10 (men's) and his feet are very slightly narrower than normal. So again, we took a chance and ordered him size 42 (besides, the size 9.5 wasn't even available as an option). Holy mother of metatarsals what sorcery is this? I put these on my feet and they felt like a soft hug! Wow! And they fit! At first I thought...oh no, they're a bit BIG. But I was sitting and so when I stood up, my toes went to the tip of the shoe. Remember how I said my foot is wide? Well oddly enough, I had to pull the straps really tight so that they'd feel more secure. This is the only downside: Because I tightened the straps quite a bit, there's a lot of extra elastic (6-8" lenght) that is going to dangle around the top of my foot (see pic). So a lot of creative tucking it in is necessary. Hubby's shoes fit him perfectly. He didn't have to tighten his as much. Very impressed by the construction of the soles; they feel sturdy and solid and flexible yet thick enough to prevent sharp rocks from poking through. I also love the shape of the toe box. It's a square shape but flattering (on me as my foot is wide). Plus, because of the mesh fabric, stitching, and detail, the shoes look like stylish athletic shoes and not plain neoprene water shoes like the kids wear. They are also extremely light and have holes in the bottom for drainage. The fabric is super soft and stretchy and they are a snap to put on. Super awesome! Not gonna lie: I don't even have socks this comfy. Could I have gone a size down? I probably could but because of my wide feet, that would be too risky. If you are a size 7 naturally with narrow feet, I tend to think yeah...you may want to consider sizing down a half size. But my toes hit the tip of the toe box when standing up and I don't want them to overhang. Any tighter and they may fit but they won't look good imo. I could see why people want to wear these all the time. They're so comfy, I bet you can even sleep in these.
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Reviewed in the United States on January 3, 2025
C
Verified Purchase
CRobin Shultz
San Leandro, US
★★★★★ 5
great water shoe!
Size: 7 Women/6 Men, Color: 3f-410 Rose Red
I absolutely loved these water shoes! They are surprisingly very comfortable and slip resistant. The sole is very thick and the material is pretty quick to dry. I purchased them for my cruise port excursions and wore them dry, in the water, and walked around after being in the water—no blisters or uncomfortable rubbing. I would say they are maybe a little on the larger side for women. I can range anywhere from a 7, 7.5 to an 8. I purchased a size women’s 7/men’s 6 and it was perfect. I am excited to wear these at the beach and in the creek this summer!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 5, 2026

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