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Cybex Eternis S, All-in-One Convertible Car Seat, Use from Birth to 120 lbs, Reclining 12-Position Height-Adjustable Headrest, Side Impact Protection, Lavastone Black

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126 ratings

| 23 answered questions

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Color: Lavastone Black

Lavastone Black

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Brand	Cybex
Installation Type	Latch
Material	Polyester, Alloy Steel, Plastic
Color	Lavastone Black
Orientation	Convertible Seat

About this item

Rear-facing from 4 lbs. to 50 lbs. Forward Facing from 22 lbs. to 65 lbs., Belt-positioning Booster from 40 lbs. to 120 lbs.
Adjustable Linear Side-impact Protection (L.S.P. System) absorbs up to 25% more impact forces in the event of a side impact collision*
Patented 3-position reclining headrest helps prevent the child's head from falling forward while asleep, keeping the head and neck in a safe position and ensures a comfortable sleeping position
12-position, height-adjustable headrest with an integrated no-rethread harness for protection that grows with your child
6-position one-hand adjustable recline for the best fit to your car

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From the manufacturer

Safety Information

To learn about the safe use of car seats and correct installation, visit the National Highway Traffic Safety Administration (NHTSA). Disclaimer: NHTSA doesn't endorse this item. The link is for informational purposes.

Product Description

The new CYBEX Eternis S All-In-One Car Seat is the only seat your child will need from birth and beyond. With three modes - rear-facing, forward-facing and booster, the Eternis S is designed for use from birth up to 120 lbs. The Eternis S offers an adjustable Linear Side-impact Protection (L.S.P. System), which absorbs up to 25% more impact forces in the event of a side impact collision* and a patented 3-position reclining headrest, which helps prevent the child's head from falling forward while asleep, guiding the head and neck into a safe position. These features, combined with a steel reinforced frame for strength and durability provide advanced child safety protection and peace of mind. *when compared to the same car seat without L.S.P. extended

Product information

Technical Details

Product Dimensions

‎25.3 x 20 x 25.5 inches

Item model number

‎518002873

Is Discontinued By Manufacturer

‎No

Target gender

‎Unisex

Minimum weight recommendation

‎4 Pounds

Maximum weight recommendation

‎120 Pounds

Minimum height recommendation

‎17 Inches

Maximum height recommendation

‎57 Inches

Material Type

‎Polyester, Alloy Steel, Plastic

material_composition

‎100% Polyester

Care instructions

‎Machine Washable

Number Of Items

‎1

Number of reclining positions

‎12

Batteries required

‎No

Orientation

‎Convertible Seat

Rear-facing minimum child weight

‎4 Pounds

Rear-facing maximum child weight

‎50 Pounds

Forward-facing minimum child weight

‎22 Pounds

Forward-facing maximum child weight

‎120 Pounds

Harness type

‎5-Point

Is portable

‎Yes

Item Weight

‎26 pounds

Additional Information

ASIN

B07HNTTWY8

Customer Reviews

126 ratings

4.7 out of 5 stars

Best Sellers Rank

#26,626 in Baby (See Top 100 in Baby)
#266 in Car Seats

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Customer Questions & Answers

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Customer reviews

5 star		84%
4 star		8%
3 star		5%
2 star		2%
1 star		1%

How customer reviews and ratings work

Reviewed in the United States on August 16, 2021

Color: Denim BlueVerified Purchase

I wanted to like this car seat so badly! It's sleek and safe and all around comfy. I was between this and the Britax one 4 life. I ultimately decided on the Britax for a few reasons... I originally ordered this one for the app technology of temperature, etc. but received the wrong one which was ironic... Normally, I would've contacted Amazon said I received the wrong one, waited for the replacement and sent the wrong one back. But after installing it and realizing it that it was the wrong one, I noticed features I hated! The buckle and clip are sooooo annoying... very annoying. I would've needed one of those little gadgets to help me out. The magnet meant to hold the clips is so far and so weak that it might as well not help me at all. It's a very wide car seat comparable to others. The strap release button was easier than the Britax but I'm more likely to need the buckle button... obviously.

9 people found this helpful

Helpful

Stephanie

Not in love with this car seat

Reviewed in the United States on February 22, 2022

Color: Manhattan GreyVerified Purchase

Where to begin with this. I had such high hopes, but this car seat has fallen short of my hopes and expectations based on other reviews. My qualms are below:

-The LATCH system straps seem to loosen over time. I've had this for a few months and have had to retighten it 3 times.
- My baby is rear facing, and the seat is not smushed between the back and front seats so there is plenty of room for recline. HOWEVER, the recommended recline position for my dude makes it so his head falls forward while sleeping if we are going up a hill.
-The harness tightening strap is impossible. I have to yank with all my might for 5 minutes every morning before daycare to get the harness tight enough to be safe. My husband has to do the same, and he will actively drive the other car to avoid this car seat.
-The chest clip and crotch button are next to impossible to undo, which is great for baby to not be able to get himself out but I have to squeeze the crotch button so hard my hand shakes to get it unlatched.

I like the idea here, and the safety features like the side-impact absorbers, but it is so user unfriendly its a bit ridiculous. Not to mention the LATCH straps loosening is a hazard for my baby. I'll probably return it and get a different, easier to use and safer seat.

3 people found this helpful

Helpful

Zaran

Like a Cadillac - lovely, but hard to park.

Reviewed in the United States on February 24, 2022

Color: Lavastone BlackVerified Purchase

I loved the safety features and all the extra padding, etc. Plus Amazon had it on sale. It gets here in three days, box was beat to hades, but inside everything was still plastic wrapped, zip tied, etc. It’s so nice. Cadillac nice. Black Lincoln nice. The padding is amazing, you don’t have to re-thread the harness, and the level indicator is a lovely added touch. I especially loved the L.S.P. feature, it just makes me feel better even if it sounds gimmicky.
However, it’s extremely hard to install. I have a newer Kia Sorento so it’s not the smallest SUV, but you wouldn’t know it putting this thing in.
The best rear facing level we could get was a 3, (1 is for newborns for reference) and even though my daughter is almost a year, I would have liked to get it to a 2. The anchors would never tighten down to where I felt they were safe. I know you can only use them to 35 lbs, but we couldn’t even use them for a little while. With the seat belt, it’s super tight and secure but the lock off feature is almost impossible to engage unless your husband manhandles it, and even then he could only get it halfway.
When it’s all said and done, she’s very comfortable and it’s easy getting her in and out of the vehicle. But I dread having to fix it if for whatever reason it gets knocked out of position or must be moved.
All in all, behind the driver’s seat (I’m 5’6”) was where we got it safely in and leveled properly. It would not fit in the middle, and the passenger side worked, but the front passenger seat had to be moved so far up, my husband couldn’t get in.
It’s lovely, but buyer beware of how large it is and how difficult the rear facing installation is.

2 people found this helpful

Helpful

Customer

Very difficult to install securely

Reviewed in the United States on January 11, 2020

Color: Lavastone BlackVerified Purchase

I don't have the option to permanently install the car seat, I need to install and uninstall it weekly. It's very, very challenging to pull the latch belts tightly enough to secure the car seat. I've read all the tips and tricks I could find, and had the best outcome pulling both straps cross-wise from the inside. Once tight, removal is a 20 minute follow-up challenge since the latch anchors don't easily release when there is tension on the belt. So many car seats have the same issue - I wish I could give them all a poor rating just to encourage the manufacturers to improve their products. I bought this car seat after graduating from the Cybex Aton 2 where the base has a brilliant belt-tensioner built-in, but this car seat offers nothing so clever. I'm going to try the Evenflo EasyLatch system a try and see if it's any easier to live with.

3 people found this helpful

Helpful

Ysabel

Al fin conseguí una silla que se adapte a mis carros

Reviewed in the United States on September 28, 2021

Color: Lavastone BlackVerified Purchase

Realmente me encantó, es súper complicado conseguir una silla que se adapte a un carro que tiene los asientos súper inclinados, con esta silla al fin lo logré, aparte que es súper elegante, fácil de limpiar y cómoda. Quizá para el percentile tan alto de mi hija, queda un poco ajustada (por lo que quiero llevarla siempre a contramarcha) pero cumple con todas mis expectativas.

2 people found this helpful

Helpful

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Rebecca

This Car Seat is a Beast! I mean that in the best way.

Reviewed in the United States on May 18, 2022

Color: Lavastone BlackVerified Purchase

Was it the easiest to to install? No. But should a car seat really be super easy to install? I don’t think so. My son in law and I installed this in 15 minutes. Most of that was finding the latch points in my SUV. I love the reinforced construction and my grandson seems to love riding in it. It’s also A LOT easier ti get him out of the Cybex car seat than it is getting him out of the Graco. Would definitely purchase again!

Helpful

Kristina Dietrich

Best in Class and the World

Reviewed in the United States on May 15, 2022

Color: Lavastone BlackVerified Purchase

I did a ridiculous amount of research on car seats! This is literally the most incredible car seat we have ever owned! It weighs a ton but installation is super easy and my toddler loves it! Calls it the comfy chair! Seriously great product! We will buy all Cybex moving forward

Helpful