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

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52 ratings

| 15 answered questions

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$299.00 & FREE Returns

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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

All-In-One Car Seat: The CYBEX Eternis S is the only seat your child will need from birth and beyond. Featuring rear-facing, front-facing, and belt-positioning booster modes, the Eternis S is designed for use from birth up to 120 lbs.
Linear Side Impact Protection: The Linear Side Impact Protection system (L.S.P.) absorbs up to 25% more impact forces in certain crashes when compared to the same car seat without L.S.P. extended.
Patented Reclining Headrest: The Eternis S headrest helps prevent the child's head from falling forward while asleep, keeping the head and neck in a safe position. The headrest also features 12 height settings for easy adjustment as your child grows.
10-Year Car Seat: The seamless transitions between modes offers up to 10 years of use from your Eternis S. An in-seat recline helps provide correct ergonomic positioning and extra legroom that lets your child ride rear-facing for longer.
Converts to Booster Seat: Ensure your child has an age-appropriate seat as they grow. Your Eternis S can be converted into a belt-positioning booster seat with a comfortable high back, suitable for children between 40 and 120 pounds.

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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

Color:Lavastone Black

The Eternis S All-In-One car seat offers three stages in one-easy to use car seat that grows with your child and provides up to 10 years of use. With the included newborn insert, the Eternis S can be used with newborns as small as 4 lbs. up to children weighing 120 lbs. or 57 inches tall. The Eternis S features seamless transitions between three modes: a rear-facing car seat for infants up to 50 lbs., a forward-facing seat, and finally a belt-positioning high-back booster seat. The Eternis S provides a comfortable and safe ride for your child at every stage. Our patented 3-position reclining headrest helps prevent your child’s head from falling forward during naps on the go. With 12 positions, the headrest can be easily adjusted as your child grows. Our Linear Side Impact Protection (L.S.P.) System absorbs up to 25% more impact forces in certain crashes when compared to the same car seat without L.S.P. extended. An energy-absorbing car seat shell further protects your child. Easy one-pull LATCH removal system and magnetic buckle holders make life easier when moving the car seat or getting your child in and out.

Product information

Color:Lavastone Black

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

Country/Region of origin

‎China

Additional Information

ASIN

B07HNTTWY8

Customer Reviews

52 ratings

4.6 out of 5 stars

Best Sellers Rank

#17,148 in Baby (See Top 100 in Baby)
#202 in Car Seats

Warranty & Support

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Customer reviews

5 star		82%
4 star		9%
3 star		4%
2 star		4%
1 star		2%

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Top reviews from the United States

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Kim

I wanted to like it... badly

Reviewed in the United States on August 15, 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.

2 people found this helpful

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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.

2 people found this helpful

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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.

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Amazon Customer

Perfect!

Reviewed in the United States on October 3, 2021

Color: Manhattan GreyVerified Purchase

I love this car seat my kids love my car seat! I love the grow with my child. A little heavier than I expected but then again what car seat doesn't have weight to it? Soo worth it! I have two and going to get one more so all of my kids have one!

Helpful

Korableva

Quality

Reviewed in the United States on February 22, 2020

Color: Lavastone BlackVerified Purchase

Easy install
Very quality build
We love it

2 people found this helpful

Helpful

pablo enriquez

Great

Reviewed in the United States on September 27, 2019

Color: Lavastone BlackVerified Purchase

I’m really satisfied with this chair, is very comfortable, easy to install and my baby is really safe on this.

2 people found this helpful

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Sarah

Rolls Royce of Car Seats

Reviewed in the United States on October 6, 2021

Color: Manhattan GreyVerified Purchase

My 1yr old loves his new carseat. Somewhat bulky but comfort, quality, and safety features cannot be topped. Another great Cybex product. Only brand I will trust with my munchkins.

Helpful

4 pounds to 120 pounds this might be the only carseat you buy!

Reviewed in the United States on July 9, 2021

Color: Lavastone BlackVine Customer Review of Free Product( What's this? )

I replaced my Maxi-Cosi Magellan Max All-in-One with this Cybex Eternis S All-in-One and honestly I am happy to have made the change. I personally find the comfort, installation, fabric, price and 3 position reclining headrest to be superior to the Maxi-Cosi. Either method you should use the tether.

The installation was pretty easy - although the instruction manual could be set up better in regards to using the cars LAP/SHOULDER BELT vs the lower anchor and their breakdown for weight limitations. You can use the lower anchor system to install until your child is 40 pounds and then you need to use the lap belt.

Rear-facing from 4 lbs. to 50 lbs.
Forward Facing from 22 lbs. to 65 lbs. (up to 40 pounds you can use the Lower Anchor system otherwise you need to use the cars LAP/SHOULDER BELT) Either Method you need to use the Tether.
Belt-positioning Booster from 40 lbs. to 120 lbs.

A tip when installing with a seat that reclines slightly - my Subaru outback features slightly reclining seats - this really helps to tighten the LAP/SHOULDER BELT. Lay the seat back as far as it will go and get the lap/shoulder belt though the back of the carseat as instructions show and ensure the Lock-Off is engaged - from there just tighten it as much as you can by pulling the lap/shoulder belt to remove slack and then bring the seat up to the correct position - this should help you get a tight installation!

-Measurements
Width at widest point: 19 inches
2 crotch buckle positions: 4 and 5.5 inches from the back of the seat pan
Seat pan depth: 13 inches
Lowest harness height: 8 inches without padding, 7 inches with padding
Highest harness height: 17 inches
Highest shoulder belt guide position: 18 inches

-Recline Positions
Rear facing: Recline positions 1,2, 3, or 4
Forward facing: Recline positions 5 or 6
Booster mode: Recline position 6 only

-Unique Features
L.S.P. - The Linear Side Impact Protection extends from the side of the seat that’s closest to the vehicle door.

I found adjusting the Headrest was super easy once I figured out how to move the toggle on the back of the seat, along with that the headrest is adjustable! This is a wonderful feature to help ensure your child is comfortable.

Headrest Adjustment - You will find this lever mounded below the headrest behind where your child's neck would be if they were sitting in the seat. Ensure it locks into place after adjusting.

Reclining Headrest - The headrest on this carseat is adjusted independently of the height adjustment and this handle is right at the top - while my first instinct was that this would adjust the height I was wrong. Depending on your
Guidelines for the headrest recline positions:
Height adjustable positions 1-3: no recline available
Height adjustable positions 4: recline 1 and 2 available
Height adjustable positions 5-12: recline 1,2, and 3 available

The top Tether is one of the most important safety features of a forward facing car seat - but if you are using this from birth, you won't need that right away and it is tucked into the back in a pocket that you just pop open from the top. This is also where the manual is stored - when you have your carseat installed forward facing that does make getting to it a bit difficult - but the digital manual is easy to find on the Cybex website.

Booster Seat - Easy enough to convert - but please read the manual as there are a few steps that you do not want to miss, such as how to fold the crotch buckle forward into the compartment on the seat pan as it stays attached to the carseat base. From there the Top Shoulder Belt Guide is easy to use and at a nice height. This booster is large enough at the base that it might be difficult for your child to buckle themselves in without engaging the locking mode.

FAA Approval — the Eternis S is approved for use on aircraft when it’s in harnessed mode. The FAA Approval label is located on the bottom of the seat. Since the Eternis S weighs in at 25 pounds, we’d be pretty surprised if too many families end up using it for travel.

Date of manufacture label — the Eternis S expires 10 years after the date of manufacture. Both the manufacture date and the expiration date are on a label on the bottom of the seat.

Overall Thoughts - The Eternis S features a plush cover and an excellent fit for both of my children in both harness and booster mode. Both of my children found it to be comfortable.

3 people found this helpful

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

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