skip to main content

One4Life ClickTight All-in-One Car Seat

Rated 4.3 out of 5
127 Reviews|, 15 Answered Questionsor
$
279.99
$
349.99
20% off
Free shipping & returns for Babylist orders $45+
We gladly accept returns on items purchased directly from the Babylist Shop within 9 months of purchase date. Returned items must be in the same condition received, unopened and in the original packaging.

For more details, view our full return policy.
color
Glacier Graphite
Thumbnail of OnyxThumbnail of Glacier GraphiteThumbnail of Onyx StoneThumbnail of Cool Flow CarbonThumbnail of Iris OnyxThumbnail of Jade OnyxThumbnail of Diamond Quilted Gray
1

Overview

Highlights

  • Fits child between 5-120 lbs
  • Stages: Infant, Convertible, High Back/Belt Positioning Booster
  • Does not rotate
  • Comes with two cup holders

Description

One4Life takes your child from birth to big kid with Britax Safety and ClickTight Installation. It easily converts from a rear-facing infant car seat (5-50 lbs) to a forward-facing 5-point harness (22-65 lbs), to a high-back belt-positioning booster seat (40-120 lbs). A removable infant insert helps keep your baby safe and comfortable (under 20 lbs) and a removable head pillow provides additional comfort.

ClickTight is as easy as buckling a seat belt, so you can install with confidence every time. Color-coded belt paths show you where to route the seat belt for each installation mode. Plus, easy-read indicators help you find the correct recline angle.

A high strength steel frame, crumple zone, and V-shaped tether help absorb crash energy. And two layers of side impact protection surround your child’s head, neck and torso.

As baby grows, adjust the 15-position headrest and harness in seconds to create the perfect fit. When it’s time for booster mode, tuck the harness into the built-in storage compartment. The quick-push, nine-position recline helps you find the most comfortable fit for your child and the best fit for your vehicle.

More comfort features include cooling channels, premium padding (like a tag-free headrest and stay-put comfort pads that prevent the harness from rubbing against delicate skin) and built-in arm rests.

What we love about it

A car seat with incredible safety features that grows with little ones from infant to big kid.

Details

  • Stages: Infant, Convertible, High Back/Belt Positioning Booster
  • Overall Dimensions: 25” (H) x 19.5” (W) x 20.5” (D)
  • Product Weight: 30 lbs
  • Rear Facing Capacity: 5-50 lbs, Max 49”
  • Forward Facing Capacity: 22-120 lbs, Max 63”
  • Number of Recline Positions: 9
  • Number of Crotch Strap Positions: 3
  • Car Seat Features:
    • Level Indicators
    • No-Rethread Harness
    • FAA Approved
  • Number of Cup Holders: 2
  • Cleaning and Care: Machine Wash
  • Manufacturer’s Warranty: 1 Year Limited

Related videos

More to consider

More to love from Britax

Q&A

Have a question? Ask an expert.Have a question about this? Ask an expert.
Start typing and see existing answers.
15 Questions
Does this seat have flame retardants?

Good news: this car seat is naturally flame retardant.

Does this car seat come with the anti-rebound bar that is always shown with the One4Life?

This car seat doesn't come with the Anti-Rebound bar, but you can purchase it separately.

Is this compatible with any stroller?

This convertible car seat can't be used with any stroller. It's meant to be installed in a vehicle.

Can I get an extra base for this car seat?

There is no extra base available for this convertible car seat as it's meant to be installed in one vehicle and stay there.

What stroller has an adapter for this carseat?

This is a convertible car seat. It can not be connected to any stroller. It is designed to be installed in a vehicle and left there. Britax does make an infant car seat that can connect with strollers, called the Britax B-Safe.

Would this car seat fit in a Toyota 4Runner rear facing?

Yes, this seat will fit in a Toyota 4Runner rear facing.

Would this car seat fit a GMC 2012 Terrain? And I know a convertible seat doesn’t come out, but what stroller would you suggest to use?

Yes, this seat would fit in a 2012 GMC Terrain both rear facing or forward facing. If you will be using this car seat with a newborn baby, you will want to be sure you have a stroller that accepts a baby from birth, like one that accepts a bassinet attachment.

What is the expiration date?

This car seat expires 10 years from the date of manufacture, which is listed on a sticker on the bottom of the seat. The date of manufacture is listed only on the seat, not the outside of the box, so the only way to discover the exact date is to purchase the car seat and open it.

Will this carseat fit in the britax b-free premium & b-safe GRN2 flexfit plus travel system stroller? I think the carseat that comes with it is smaller. Is there a model of the stroller that has this carseat for this age range?

The Britax One4Life is a convertible car seat and is intended to remain installed in a vehicle. There are not any convertible car seats that are compatible with strollers.

Does this car seat fit in sedans?

This car seat will fit in a sedan. The measurements of this seat are 20.5 x 19.5 x 25 inches.

Customer reviews

127 Ratings
4.3out of 5
127 Ratings

Rated 5 stars by 67% of reviewers

Rated 4 stars by 13% of reviewers

Rated 3 stars by 5% of reviewers

Rated 2 stars by 6% of reviewers

Rated 1 star by 9% of reviewers

1-10 of 127 Reviews
Rated 5 out of 5
Feb 10, 2025
Impresse
Easy instal with the click and with the latches. Sometimes the straps become uneven. But we were t boned on where my son was in the car seat and he is completely fine. I’m very impressed
Rated 3 out of 5
Feb 8, 2025
Car seat buckle starting to fray after 2 yrs using
I bought this car seat in February 2023 thinking that it would last a 10 years or somewhat close, But the buckle is already starting to fray - not the chest clip area but the bottom clip is fraying. I’m not sure if it can be replaced, What if that is starting to wear after only two years I am worried about the integrity of the rest of the car seat. - I would still recommend this car seat because it is a great car seat. I am just worried about the integrity of it After only two years when it is said to last for 10 years, I would like to re-purchase the same car seat, but I honestly don’t know.
Rated 3 out of 5
Dec 9, 2024
Headrest cushion ALWAYS pulls down and is a pain.
I want to love this seat, but I don’t. My daughter says the seat is not comfortable, and the back rest cushion and headrest cushion are constantly sliding off/down. The little Velcro tabs do absolutely nothing. I have to readjust the headrest cushion up over the foam headrest every time I get my child in and out. It is super annoying. The only thing I do like about this car seat is the ease of the Click-Tight installation. Other than that, there are too many other factors that make this car seat a daily frustration. I wish I wouldn’t have spent $400 on this.
Rated 1 out of 5
Nov 9, 2024
Wouldn’t recommend. Rust very bad
Don’t recommend if you plan on using it for over 2/3 year. Most all the metal spots under the cover are rusted and I emailed britax and all they could do was offer me 30% off to buy a new one because they don’t recommend me to continue to use it. Spent almost 400$ on it and am very disappointed in quality. I have one for my other son as well but I won’t be buying anymore britax products in the future. Also it’s literally called one for life and is already rusted. Under 3 years later.
Rated 4 out of 5
Nov 8, 2024
Great Slim All In One Car Seat
We installed the Britax One4Life Slim All-In-One car seat in our F-150 extended cab truck. We have 3 children, only one of which can ride in a booster, so basically three car seats across. My two favorite features of this Britax car seat are the slim design and the way the across anchor belt can be stored within. I’ve never had a slim car seat before, but I can see the difference it makes. I also really liked the fabric design - which isn’t necessary, but an added bonus (got the mineral gray).
The car seat was relatively easy to install, but I do think it requires reading the instructions thoroughly. The cup holders are optional, but installing them doesn’t take away from the slim design.
My only critique of the car seat is the harness release. I feel like it is in a low position and it seemed I had to really push it to be able to loosen the harness, but maybe over time it will be a little easier.
Overall, it’s a great car seat!
Thanks to the Stellar Product Testing Panel for providing me with this car seat.
Rated 5 out of 5
Nov 4, 2024
Innovative Car Seat
I received this car seat from the Stellar Product Testing Panel. This is overall a wonderful car seat. I was a little surprised at the heavy weight of the carseat but it's not an issue since we don't change between cars. This car seat is a high quality car seat built for security and comfort.
We were a little confused about the installation of the car seat backwards with the click tight system but once we read in the manual how to access that, its a pretty great feature. The car seat shows the routing of the belt for different set ups. Once in place, seems like a secure seat.
The ventilation features of the car seat are wonderful for our warm kiddo. The seat is also well designed for easy cleaning. It's a minimalist type design with comfort and secure structure. I don't love the chest buckle compared for another car seat we have but it's completely functional with no issues. This seat is also great for a slim fit to get three people in the back seat. The click tight system also is a nicer feature for three car seats because you didn't have to struggle to use the latch system worth three seats since you use the seat belt.
Rated 5 out of 5
Nov 3, 2024
Top quality and design
As someone who has purchased ~8 carseats, this was the EASIEST install experience. I didn’t even have to google a how-to video and rewatch it over and over again. It was very intuitive. That said, it’s a heavy car seat so although the install is quick, it’s not a “portable” car seat.

The slim design is great, doesn’t feel restrictive or tight for my toddler, and fits in my car with 2 additional car seats/boosters.

The fabric is good quality and the seat itself feels plush.

Easy to buckle in and out—and the adjustable headrest is great and easy to use. I hiff g hot recommend.

I received the product as part of the Stellar Product Testing Panel.
Rated 5 out of 5
Nov 3, 2024
5 Star Car Seat
I recently received the Britax One4Life Slim All-In-One car seat from the Stellar Product Testing Panel, and I have to say, the overall design really impressed me. The fabric and cushioning feels super luxe, and both my 17 month old (~22lbs) and almost 4 (~38lbs) year old fit in it in rear facing mode very comfortably with no complaints - a tall order! It fits perfectly in my sedan without taking up too much space, which is a game-changer when you’ve got other kids or gear to fit in. Plus, it feels super sturdy and secure, so I know my little one is safe and sound. While I only have 2 car seats in my car, I'm pretty sure I could fit 3 across in my car with this seat.

My favorite part was how quick and easy it was to install, with no second guessing myself on if it was tight enough due to the click tight install. The One4Life comes with clear instructions and helpful guides, making it straightforward to set up. I was able to adjust the harness and seat angle quickly to get the perfect fit. It’s reassuring knowing that I can get it right with minimal fuss.

While I’m currently using this seat in rear facing mode, I love that I will be able to use this for many years to come for either/both of my children. I love that it will grow with my family, so I won't have to buy multiple seats as my child gets bigger. It’s perfect for busy parents who want something that lasts and adapts to changing needs.

One of my favorite features has to be the extended rear-facing option. It gives me peace of mind knowing I can keep my child safe in that position longer. This, combined with the easy install makes the Britax One4Life Slim a winner in my book—comfortable, safe, and easy to use. I highly recommend it to any parent looking for a reliable car seat!
Rated 4 out of 5
Nov 3, 2024
Absolutely beautiful carseat
My first impression is that this is an absolutely beautiful carseat!

We have 3 kiddos - 8, 4, and 2 so we've had our share of carseats and highback booster seats. Also both grandmas have carseats to transport our kiddos so it's safe to say, that we have done a LOT of carseat installs!

Right out of the box, it's definitely heavier than other seats we have had so it's probably not the best to travel with or change between cars, but it felt extremely sturdy and I know it will keep our kiddo safe.
I love that it will last from the newborn stage (even though we don't have a newborn) through the big kid stage. It's super helpful not to have to buy another carseat when they get bigger! Also, it allows you to keep your child rear facing longer if you have the space to do so in your backseat.

Pros:
- you only need this seat for the whole time your child needs a carseat
- it's beautiful and stylish
- it's slim fit in case you need to fit 3 across your backseat
- adjustment was easy to fit our 2 yr old
- material feels durable and you can pull the inside part out to wash

Cons:
- it's heavy and bulky despite it being a slim fit model
- it wasn't slimmer than our previous slim fit seat, but it's definitely slimmer than a regular seat
- it's pricey, but I do believe it falls in line with other models of the same brand

I had to read the instructions a few times as this is my first Britax seat so I wasn't familiar with the install and it was a little confusing to me. (I might be in minority on this because it seems that others had no issues with install).

Overall, I would recommend this seat, especially as a slimfit option!

Thanks to the Stellar Product Testing Panel for providing me with this car seat.
Rated 5 out of 5
Nov 3, 2024
So easy to get a secure install
I already had a car seat that was narrow for 3 across use, and while it was a good seat, it had some functional problems in my car. For this reason, I was thrilled to receive this Britax seat for free in exchange for my honest review from Stellar.
This seat is exceptionally easy to install. I have 3 kids and I have had many car seats, and this seat so far is right up high on my favorite list. The cover is plush and I love the silver/Grey (I live in a hot place) and though the seat is narrow for 3 across it is not so long front to back that my front passenger seat is unusable (a real problem with the seat this is replacing). I would absolutely have spent my own money on this seat and am really glad we had the chance to try it out.

Guides