Britax Poplar Convertible Car Seat Slim 17" Design ClickTight Technology - Stone Onyx: Multi-Position Recline, Fits 3 Across, Forward/Rear Facing
$349.99
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- $397.99 - $449.99Lower price on select items4 out of 5 stars with 48 ratings
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4.7 out of 5 stars with 97 reviews
5 out of 5 stars
23 March, 2026
originally posted on britax.com

Installation is so easy!
Love this car seat so much! My 9 month old is super happy to be able to see more, and seems so much more comfortable in his big boy seat. Switching between my husband truck and my car is so easy as well. The clock tight is a must have for switching a car seat back and forth.
4 out of 5 stars
17 February, 2026
originally posted on influenster.com

Great car seat!
[This review was collected as part of a promotion.] I loved this car seat for my daughter. I’ve never heard of this brand before but I was not disappointed! It adjusts so that as she grows the car seat will grow with her! And it met all my safety concerns so that’s a plus!
3 out of 5 stars
22 January, 2026
originally posted on britax.com

Sand Onyx is not Tan!
Awesome product! This is our second purchase for second vehicle. Very easy to install and adjust. Game changer compared to other “top” brands. I am disappointed because in the pictures this looks tan. It looks grey in real life.
5 out of 5 stars
1 November, 2025
originally posted on britax.com

Great seat!
We absolutely love this seat. The install is a breeze, my kids prefer it comfort wise over our old gracos. The extended rear facing limits are fantastic, our 4.5 year old is still comfortably rear facing in hers. Easy to assemble and wash. Very slim side to side and incredibly compact front to back.
3 out of 5 stars
10 August, 2025
originally posted on britax.com

Can we get a moms input in design PLEASE
Britax. Can I ask WHY the strap pads are connected to the car seat? Why would these not be removable to easy washing? Which leads me to my next point… why are there so many elastic loops in impossible to reach hooks that hold the cushions in place. Car seats have to be washed. Their ease in washing ability is what makes or breaks a car seat for me. I love this car seat but zero stars for its wash ability. Also, the anchors are not click connect, they are the incredibly frustrating squeeze latch thing. 0/10 recommend. You definately want the quick and easy latches that are just like car seat buckles.
5 out of 5 stars
8 August, 2025
originally posted on influenster.com

Nice
[This review was collected as part of a promotion.] Really good carseat, seems very safe, easy to install, nice color, durable, looks comfortable. No complaints, it’s adjustable, i recommend for others to try it out
5 out of 5 stars
27 June, 2025
originally posted on influenster.com

Love this car seat
[This review was collected as part of a promotion.] Absolutely love this car seat. Super comfortable my child fits in it I perfectly. Love the safeness of this car seat. Installing it was super single and not hard at all.
5 out of 5 stars
5 May, 2025
originally posted on britax.com

Versatile and easy
This car seat is amazing. It’s beautiful, it’s strong, and easy. Installation was a breeze, and I thank britax for putting clear instructions on the seat insert stating under 22lb, you must use it rear facing. My 13 month old is 19lb and I definitely took the insert out before seeing the warning on it! The shoulder pads are amazing as they don’t fall down because they have grippies on them! My daughter was no longer liking the infant seat which is why I got this one and now, she loves sitting in her big girl car seat!
4 out of 5 stars
24 March, 2025
originally posted on influenster.com

Easy to install
[This review was collected as part of a promotion.] Easy to install and toddler seems comfortable. In line with other seats for safety features and has held up well so far. Cost is a bit higher but overall decent value.
2 out of 5 stars
4 March, 2025
originally posted on britax.com

Not for kids who get car sick
This is our 8th Britax car seat, so we love the brand, just not this particular seat. Loosening and tightening the harness is more difficult than it should be, the lever to hold while loosening the straps is buried under layers of fabric and the strap to tighten them is against the seat of the car. Our baby gets car sick often and it is a nightmare to clean. The shoulder pads are not removable, so we cannot wash the smell out of them. I do not believe the straps or favorite around the rebound bar are removable either, if they are, we haven’t figured it out. The pieces that do come off don’t go back on as nicely, so we have an expensive car seat that looks and smells awful. The click tight function seems to be very temperamental compared to our other click tight car seats and I find myself having to manually unlock the bottom of the seat before pushing it down. The head rest adjust nicely, and it looks very cushy. If knew 9 months ago what I now, I would have kept our marathon opted for another brand.
5 out of 5 stars
3 February, 2025
originally posted on britax.com

Very happy with purchase
When our previous convertible car seat was recalled, I began looking for a replacement option. I had always heard Britax was a reliable brand and was drawn to the 50lb rear facing limit of the Poplar. The click tight technology makes for an extremely easy installation and the seat feels very tight and secure once installed. My son seems comfortable and I like that the sides are slight lower than our previous seat, which makes it easier to get him in and out. The only negative I’ve run into so far (which is more just an adjustment vs. our previous car seat) is that the harness release button is sometimes hard for me to find/reach. I provided this honest and true product review in exchange for a rebate on my purchase.
5 out of 5 stars
24 August, 2024
originally posted on britax.com

We love this seat!!
We recently got this seat as our daughter was outgrowing her infant seat and we’re in love! It’s so beautiful and comfy. We picked the S as there was more cushion/padding included and I’m glad we did. We did notice that Britax car seats tend to have shorter crotch straps, but she still fits in this comfortably And has no problems with the buckle. I’d highly recommend this seat!!
5 out of 5 stars
17 August, 2024
originally posted on britax.com

Great quality! Easy to install!
The car seat is very nice quality. Out of the box you can see a lot of labeling for where things should go and how to install. The instructions are very simple and when I wanted a visual example there are several on YouTube. After following the YouTube video I had the car seat installed and used the recommended seat belt method. Using the seatbelt was even less intimidating than the lower anchors because of the click tight technology. One of the biggest draws of this car seat was the promise of front to back space saving. It is a much better fit than our maxi-cosi infant car seat. Thankful it still seems very roomy for the baby. The only negative I ran into is that we are using this for our 40 percentile 5 month old and I wasn’t sure if the harness pads needed to be used for her. (They don’t). After some searching and googling I was able to find the answer.
5 out of 5 stars
16 August, 2024
originally posted on britax.com

Love this seat!
Love this seat! I love the slim design of the Poplar! We have loved the clicktight feature on all of our Britax seats (this is our third seat) and we have not been disappointed! The Poplar will provide a lot of flexibility when transporting 3 across. Very happy with this purchase! I provided this Honest and True Product Review in exchange for a rebate on my purchase.
5 out of 5 stars
13 August, 2024
originally posted on britax.com

Better than expected & will get long use from it!
Installing this car seat was a breeze and I really took a liking to this click-tight system- makes me confident that my baby is riding safely. The cushions look way more luxurious in person than in pictures and I see the Poplar lasting for several stages. Aside from being a convertible car seat, that will transition to forward facing, it has a lot of head positions so if my baby needs the height i'm certain it will accommodate! It's nice that the Poplar is set up so you can add the stability bar if you're fixated on that. My only wish is that Britax made a way to add a canopy for extra shade like many infant car seats already come with. I provided this Honest and True Product Review in exchange for a rebate on my purchase.
5 out of 5 stars
16 July, 2024
originally posted on britax.com

Small seat with BIG LOVE!
We wanted to wait for this review until after our big up-north trip, and I am SO happy I did because it was AMAZING! My daughter who NEVER naps anymore since being forward facing, napped half the trip because she was so comfortable! The ClickTight installation system is a game-changer. It makes installing the seat so easy and secure—no more wrestling with seat belts or worrying if it’s in right. The built-in lock-offs and LATCH connectors are straightforward, making the whole process quick and hassle-free. My daughter loves this seat! It’s super padded and comfy. The adjustable headrest and harness will grow with her, so she’s always snug and happy. Plus, there are multiple recline positions for rear-facing babes. The Britax Poplar has a nice compact design. It’s roomy enough for my daughter but doesn’t take up too much space in the car. It would definitely fit well in smaller cars, and even in our large SUV we needed a seat that could fit with multiple in the 3rd row. Overall, I’m super happy with the Britax Poplar car seat. It’s easy to install, super comfortable for my daughter, and fits well in my car. Highly recommend! I provided this Honest and True Product Review in exchange for a rebate on my purchase.
5 out of 5 stars
24 June, 2024
originally posted on britax.com

I wish I had this seat three years ago!
I have been a fan of Britax since I purchased our first Britax three years ago. When Britax came out with the Poplar, I knew I would be a fan. We needed a convertible seat for our 10 month old and this was the perfect choice. I am so impressed the comfort, sturdiness, and extra convenience features this seat has. I provided this Honest and True Product Review in exchange for a rebate on my purchase.
5 out of 5 stars
22 June, 2024
originally posted on influenster.com

Great car seat for transitioning out of infant car seat
[This review was collected as part of a promotion.] Great car seat with amazing safety features. Installation process was very easy. Comfort level seems to be a 5/5. Adjustability and durability of this car seat really impressed me!
5 out of 5 stars
7 May, 2024
originally posted on influenster.com

Convertible car seat
[This review was collected as part of a promotion.] Durable and easy to install great safety features adjustable for an infant or child.. my baby always rides in the back seat so comfortable he sleep during the whole ride..
4 out of 5 stars
29 April, 2024
originally posted on influenster.com

Good car seat
[This review was collected as part of a promotion.] I received a coupon for 50% off this car seat for an honest review. I have never herd of this brand before this. Loved the durability and style of this car seat. Easy to install and had great safety features.