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Britax One4Life Slim ClickTight All-in-One Convertible Car Seat

Converts from an infant seat to a booster, lasting for up to ten years.

Grows With Your Child

The ClickTight system lets you secure the seat safely in three simple steps.

Easy To Install

The slim 17.5-inch width is designed to fit three seats across your backseat.

Fits Three Across

You can easily toss the car seat cover in the washer and dryer.

Washer And Dryer Safe

Change the harness and headrest height together without any tedious rethreading.

Adjusts With One Hand

<ul><li><strong>Extended Child Growth Support</strong>: Accommodates children from birth to adulthood, converting from rear-facing (up to 22.7 kg/50 lbs.) to forward-facing (up to 29.5 kg/65 lbs.) and high-back booster mode (up to 54.4 kg/120 lbs.) for 10 years of use.</li><li><strong>Confident Installation</strong>: Features ClickTight installation for secure setup in 3 steps: pinch to open, thread and buckle, click to close.</li><li><strong>Space-Saving Design</strong>: A 44.5 cm (17.5”) slim exterior allows for fitting 3 seats across in some vehicles, while maintaining a spacious interior.</li><li><strong>Effortless Adjustments</strong>: A 15-position, no-rethread harness and headrest adjust with one hand, and a 9-position recline includes an easy-to-read indicator.</li><li><strong>Simplified Cleaning</strong>: The base and shell are easy to wipe clean, with minimal grooves in the seating area, and the car seat cover is machine washable and dryer safe.</li></ul>

Safety Harness Style

Child Car Seat Style

Car Seat Facing Direction

Minimum Weight

Child Car Seat Feature

Product Multifunction Descriptor

Brand

Has Written Warranty

Features

Colour

<p>The One4Life&reg; Slim all-in-one car seat takes your child from birth to big kid with trusted Britax safety, ClickTight&reg; installation, and a slim SpaceSaver&trade; design.</p>
<p>As a convertible and harness-2-booster seat in one, it grows with your child for 10 years. It starts rear-facing with an extended capacity of up to 22.7 kg (50 lbs.), so your child can ride rear-facing longer. It easily converts to forward-facing toddler mode (up to 29.5 kg/65 lbs.) and high-back belt-positioning booster mode (up to 54.4 kg/120 lbs.) when your child is ready. With a slim outside and spacious inside, the 44.5 cm (17.5&rdquo;) seat is designed to fit 3 across* without compromising safety and comfort. ClickTight helps you install with confidence, every time. The base and shell are easy to wipe down for hassle-free cleanup. The car seat cover is safe to machine wash and dry, and it&rsquo;s naturally flame-retardant with no added FR chemicals.</p>
<p>One4Life Slim features an anti-rebound bar, a high-strength steel frame, a SafeCell&reg; crumple zone, and a V-shaped tether. As your child grows, you can easily adjust the 15-position no-rethread harness and headrest with one hand. With cooling channels, premium padding, a lower infant insert and upper body support pillow, and built-in armrests, your child will love every ride.</p>
<p>*Britax cannot guarantee 3-across fitment in all vehicles.</p>
<h4>Features:</h4>
<ul>
<li>All-in-One Car Seat: One4Life&reg; Slim is a convertible and harness-2-booster seat in one! It easily converts from a rear-facing infant and toddler seat (2.3-22.7 kg/5-50 lbs.) to a forward-facing seat (10-29.5 kg/22-65 lbs.) to a high-back booster seat (18.1-54.4 kg/40-120 lbs.)</li>
<li>ClickTight&reg; Installation: Install with confidence in 3 easy steps: pinch to open, thread and buckle, click it closed!</li>
<li>SpaceSaver&trade; Design: Slim outside, spacious inside! The 44.5 cm (17.5&rdquo;) seat is designed to fit 3 across without compromising on trusted Britax safety and premium comfort *Britax cannot guarantee 3-across installation fitment in all vehicles</li>
<li>Premium Car Seat Cover: Features a soft knit fabric with woven m&eacute;lange accents that are made from recycled polyester; the cover is safe to machine-wash and dry and naturally flame retardant with no added FR chemicals</li>
<li>Trusted Britax Safety: This slim car seat features an anti-rebound bar, a patented V-shaped tether, SafeCell&reg; technology, a high-strength steel frame, and two layers of energy management</li>
<li>Hassle-Free Cleanup: Extra space between the shell and base means you can clean under the seat with ease &ndash; and with minimal grooves in the seating area and base, you can wipe it down with no fuss</li>
<li>Comfortable Rides: This slim car seat includes comfort pads, built-in cooling channels, a lower infant insert and upper body support pillow, plush padding, and a tag-free headrest</li>
<li>Easy to Adjust: The 15-position no-rethread harness and headrest adjust together easily with one hand, and the 9-position recline has an easy-read indicator to help you find the correct angle for your vehicle</li>
<li>Slide-Out Cup Holders: The dishwasher-safe cup holders slide out with ease for convenient cleaning and click back into place for a secure attachment during rides</li>
<li>Accessible Color-Coded Belt Paths: Make it easy to route the seat belt through the correct path for each car seat mode</li>
</ul>

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Protect it today, enjoy it for years - plan covers:<br><br>• Mechanical and electrical failures<br>• Breakdowns or failures from normal use<br>• 24/7 virtual tech support and Fast online claims backed by our 3-Business-Day Service Guarantee<br>• Includes 100% parts, labour and shipping - no deductibles

<a href="https://asur.me/legalwarranty"target="_blank" rel="noopener noreferrer">Notice for Quebec Customers</a><br><br><b>Protect it today, enjoy it for years.</b><br>Get low-cost, great value protection that goes beyond the manufacturer’s warranty, keeping your product covered when you need it most.<br><br><b>Protection covers:</b><br>• Mechanical and electrical failures.<br>• Defects in workmanship and materials from normal use.<br>• Fast, easy online claims backed by our 3-Business-Day Service Guarantee.<br>• 100% coverage for parts, labour and shipping - no deductibles or additional cost (pay $0 for approved claims).<br><br><b>How the Plan works:</b><br>1. Add a Plan to your order.<br>2. Plan details will be emailed to you after completing your purchase.<br>3. Start a claim online anytime or by phone.<br>We’ve got you covered up to the amount you paid, whether it’s a replacement, a refund or repairs.<br><br>You can cancel within 90 days of purchase for a hassle-free refund, according to your plan terms.<br>Limitations and exclusions apply. For more details, <a  target="_blank" href="https://i5.walmartimages.ca/dfw/8822aef6-f68b/k2-_70b1a5be-58e2-4050-a066-c561ee770b7e.v1.pdf?icid… rel="noopener noreferrer">view the terms and conditions. </a>

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               <h3>4 equal payments</h3>
               <h4 class="gray">Buy what you love and split the cost. It's that easy. </h4>
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            <b>
               <li>Add item(s) to your cart.</li>
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                  Add items to checkout and choose 
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               <li>Your first payment is taken when the order is processed, and the remaining 3 are automatically taken every two weeks.</li>
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            <p class="gray">Please note that a higher initial payment may be required for some purchases. Pay later in 4 <a href="https://cdn.klarna.com/1.0/shared/content/legal/terms/0/en_ca/paylaterin4" target="_blank">terms</a> available here. For Quebec residents, these Pay Later 4 <a href="https://cdn.klarna.com/1.0/shared/content/legal/terms/0/en_ca/paylaterin4_quebec" target="_blank">terms</a> are applicable. </p>
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        <img
          width="35%"
          src="https://i5.walmartimages.com/dfw/8822aef6-971e/k2-_ed78b905-6394-4f88-a805-ab299123f2cc.v1.png"
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        <h3>Shop today, take time to pay</h3>
        <p>
          Split your purchase into 6 equal installments*  /
          <a
            href="https://i5.walmartimages.ca/dfw/8822aef6-d3f1/k2-_417f32f7-5074-45a6-b23d-5d5b3039e5b8.v1.pdf"
            target="_blank"
            rel="noopener noreferrer"
          >
            Terms and Conditions apply
          </a>
        </p>

        <h4>Here's how it works</h4>
        <ul class="tl">
          <li>Spend $199.99 or more on walmart.ca**</li>
          <li>Select Installment Plan at checkout</li>
          <li>
            Pay with your Walmart Rewards Mastercard. If you don't have one,
            click "Apply Now".
          </li>
        </ul>

        <h4>Details</h4>
        <p>
          Your qualifying purchase will be split into 6 equal monthly
          installments charged to your Walmart Rewards Mastercard. If your items
          ship on separate dates, each shipment will be converted to a separate
          Installment Plan.
        </p>

        <h4>Don't have a Walmart Rewards Mastercard?</h4>
        <p>
          Apply now and upon approval use your new account to enjoy the
          convenience of an Installment Plan on eligible purchases*. Purchased
          items must appear on a single receipt totaling $199.99 or more (before
          taxes, discounts, Walmart Reward Dollar™ redemptions, and
          shipping/delivery fees)∆
        </p>

        <p>
          *See
          <a
            href="https://www.walmart.ca/cp/shop/installment-plan/6000204340202?icid=Glass_PIP_FinancingOptions_WRMC_LearnHow_TermsConditions2_WM"
            target="_blank"
            rel="noopener noreferrer"
          >
            Terms and Conditions
          </a>
          for full details
        </p>

        <p>
          ** Eligible Installment Plan purchases are excluded from earning
          Walmart Reward Dollars™. Walmart Gift Cards and Walmart Reward
          Dollars™ cannot currently be used on Installment Plan transactions.
         
        </p>

        <p>
          ∆ All new credit card applications are subject to approval by
          Fairstone Bank of Canada.
        </p>

        <div class="pt3">
          <a
            href="https://www.walmart.ca/en/cp/installment-plan/6000204340202?icid=Glass_PIP_FinancingOptions_WRMC_LearnHow_ApplyNow_WM"
            target="_blank"
            rel="noopener noreferrer"
          >
            <button
              class="pv2 ph3 sans-serif bg-blue white bn no-underline br-pill f6 pointer b"
              type="button"
            >
              Apply now
            </button>
          </a>
        </div>
      </div>
    </div>
  </body>
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Actual Color

Parchment

Raven Black

Ease Of Installation

Instructions Clarity

Design

Car Fit

Fabric Softness

Slim Profile

Safety Features

Child Comfort

Straps can be customized to fit different body types.

Features a soft design for a comfortable ride.

Prioritizes safety without compromising comfort or fit.

Requires some effort but overall a simple process.

Can be confusing, but also easy to follow with clear instructions.

Accommodates larger babies with extra space.

I chose Britax because 1: of high reviews regarding their safety standards, and 2: I wanted a car seat that would last my baby's entire childhood.

The seat has a steel frame and is adjustable throughput all stages of car seat needed sizes.  (I don't want to have to buy 2-3 car seats per kid and always have some unused one sitting around like clutter.)
This is my second Britax for my second child and the first one has been simple to adjust for my first kids growth. Cleaning it is a bit much only because of the pain of taking everything off and on but it's not not confusing to put back and it's cleaned up like new each time I've had to strip the cloth portions off to toss in the washer.
There are plenty of clear pictures and straightforward instructions on the car seat  so you wouldn't need to use the user manual to install or adjust it but the user manual is itself very straightforward to follow along with.
If you are looking for a car seat you can carry around, get one of their different models. If you want to consciously avoid leaving your child in a car seat for too long then this will ensure they only stay in the seat while they're in the car. (I just baby wear when I'm out so it works for me)
If your priorities for a car seat are:
Safety 
All in One (never have to get another)
Ease of installation & adjustment 
Machine washable cloth portions 
Attractive design 

Then the All in One by Britax meets these specifications 
I'm happy with both of mine and I will keep using them as I expand my family.

One and Done

britax.com

[This review was collected as part of a promotion.] We have been Britex One For Life fans from the get go, so having access to a slim version is like a dream come true. Thanks to the Stellar Product Testing Panel, I have been given the opportunity to try out this car seat, and I couldn't be happier with it! 

Our backseat space is limited, and while the regular One For Life worked well, things were cramped, especially if anyone else needed to sit in the backseat. With the slim, there is plenty of room without feeling like we are encroaching on the car seat or the safety of our child. It was incredibly easy to install, which is a big plus for us, and the instructions to install being on the side of the car seat is incredibly helpful. Adjusting it for my child was straightforward, and I love how much more comfortable the seat is in the slim vs the original! 

My son is in the high end of percentile for his height, so having a seat with extended rear facing ability was very important to us, and this meets our needs! We prefer to keep him rear facing as long as we're able, and were very happy with the limits on the slim! He's not cramped in the seat and fits very comfortably. It checks all of our boxes for comfort, safety and longevity of use.

Overall, I am very impressed with how much space this seat saves without compromising safety, fit or comfort. It still maintains all the features of the regular One For Life, with a smaller footprint. I would absolutely recommend this seat if you're looking for one to grow with your child!

So in love with the slim version

[This review was collected as part of a promotion.] Love love love this car seat! The fact that it is slim and an all-in-one car seat makes it the perfect forever car seat. I love the fact that it  is so slim that it fits in my small Ford Focus yet I still have space for two other people. I have the car seat set up in the middle of my back seat and it works really well!

The Britax One4Life Slim All-In-One car seat gives me the longevity I am looking for in a car seat. The fact that I can use it for my newborn or my toddler is amazing. I love that I can rear-face both of them for longer (up to 50lbs)! Currently I have been using it for my toddler and he seems really comfortable rear-facing. Adjusting the cushy straps and the padded headrest for him has been easy. 

The best feature of this car seat is how easy it was to install! The easy to follow instructions in the manual along with the ClickTight feature made the installation a breeze. Looking at the car seat, I thought installation was going to be hard but honestly, the ClickTight feature is amazing and I was able to install the car seat without yelling or cursing. 

Overall, I highly recommend this car seat. The attention to detail Britax gives to their products and the safety features makes this car seat worthwhile. 

My family and I want to thank the Stellar Product Testing Panel for providing me with this car seat.

The Perfect Forever Car Seat

[This review was collected as part of a promotion.] 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.

Innovative Car Seat

I bought this car seat because it has a higher harness height than most others and can do rear facing to 50 lbs. My 6 month old is 21 lbs and 30 inches so having a car seat that can last longer for her was important, since I am assuming she will continue to trend big. The car seat feels study and safe. The only disappointing part is it is hard to tighten the harness. You have to do small, short jerks. I even had to read forums on how to tighten it because it is hard.

Great Car Seat

I didn't get any incentives or free products. I had to pay for my seat. 
I love that I theoretically won't need another seat for the life of my child. However, this seat is not meant for newborns or infants. Recommend the youngest is 4-5 months when they can hold their head up themselves due to having to take baby in and out. There's no easy way to lug this bad boy up stairs with your child still tethered to it and keeping it out of the heat is a no go. Once you have this thing in you should leave it.trust me…
It's bulky and isn't the easiest when leveling the seat. 
The 5 point harness would be better in the crotch buckle had more cloth to cover the plastic so it doesn't dig into baby skin or burn baby skin in the heat. And less weird flaps and folds when trying to adjust to height and weight of the baby too please. Make the outside seamless and the folds on the inside. 
I think that's all. 
K thanks for coming to my unpaid and honest review.

One 4 Life

[This review was collected as part of a promotion.] Wow, I was so excited to test this seat as the proclaimed “car seat guru” of my mom friends. Thank you so much to the Stellar Product Testing Panel for providing me this car seat to review!

In general, I think this really lives up to the Britax hype and is an excellent seat. However, there were a few flaws worth noting.

I LOVED how this seat looks and feels. It seems like a high end product with great materials and craftsmanship. The seat isn't super heavy for a convertible and my husband even noted the carry handle was a nice touch. The install was a piece of cake with the clicktight mechanism. I actually had to loosen the strap underneath since you don't have to get it super tight to get a secure install! The seat takes up very little room and I loved the various recline angles, which meant lots more leg room in our car than with our other car seat!

The only real downside I had was the buckle harness is IMPOSSIBLE to tighten with your child in the seat. The straps could tighten and slide perfectly when he wasn't in the seat (I checked multiple times thinking it was caught on something, but it wasn't) so I'm not sure what was happening. As soon as I got him in neither myself or my husband could the the tightening strap more than about a centimeter. This made properly securing our child a challenge. The only workaround we found was we would tighten the straps more than we knew he would need before we put him in and then let out the tiniest bit of slack to fasten the buckles. I asked several other friends with Britax car seats if they have ever run into this issue and they all said they had a similar challenge.

Overall, I do love this seat and the higher rear facing weight limits. We plan to use this when my son outgrows his current car seat and loved everything about it EXCEPT the harness so I am still trying to figure out how to make that work.

Great seat with some downsides

[This review was collected as part of a promotion.] 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.

Great Slim All In One Car Seat

This car seat is for a baby that's not die until another 6 months so ya. Also I'm being made to include at least 128 characters so here is the rest of the review wasted on what you're reading currently.

Haven't Used it Yet

The new side pads on the seat are horrible. They don't let your kid move their thighs out of the way so when you buckle them in their thighs get pinched. I really hate this feature and so does our son.

The new seat pads are horrible

Britax One4Life Slim ClickTight All-in-One Convertible Car Seat front three-quarter view of the slim SpaceSaver shell in dark woven mélange fabric, showing ClickTight belt path and ClickTight-ready latch, 15-position no-rethread harness with one-hand adjustable headrest, anti-rebound bar at the base, slide-out cup holder and built-in armrests; seat width 44.5 cm (17.5").

Britax One4Life Slim ClickTight All-in-One Convertible Car Seat

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