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Your cart is empty.The knox's smart Secure system features an indicator window that turns from red to green when the seat is correctly installed. A multi-directional tether and the knox's energy response technology provide unparalleled safety and performance. The KNOX is the first child restraint to include koroyd technology designed to absorb the maximum amount of energy from an impact. Approximately: 1-6 years infant insert: 14-25 lbs. Rear-facing: 14-45 lbs. Forward-facing: 25-65 lbs. Height: up to 49" Fmvss 213 Max weight of child (lb) 65 min/Max weight of child 14-65 lbs. Seat height lowest position: - Seat bight to inner edge (highest point) of harness slot is 10" - Seat bight to top of headrest is 19" Seated height in highest position: - Seat bight to inner edge (highest point) of harness slot is 17.5" - Seat bight to top of headrest is 26".
J Whorley
Reviewed in the United States on February 7, 2025
We've been very happy with this Uppababy carseat model. Use it almost daily and have flown with it as well (using the UPPAbaby luggage for it) and it's holding up good as new! Our 15 month old is comfortable and loves his car rides.
Tara
Reviewed in the United States on February 5, 2025
As always, Uppababy’s products are top of the line. The car seat is easy to install and use, and feels solid, unlike cheaper brands. I am a research fiend when it comes to big buys for my kids and this one did not disappoint.
Lane Brannam
Reviewed in the United States on February 26, 2025
I rarely write reviews but I decided on this car seat because we loved our uppababy Mesa V2 so much. I have a relatively small car (Honda Fit) and many of the reviews on this car seat made me concerned it would not fit, with people saying they had issues in smaller cars. Sure it’s a big car seat, but most for babies and toddlers of this size are. It fit in my car just fine. I won’t comment on other functions of the seat since we have only used it a short time, but installation was easy and it fits just fine.
Brittany Donaldson
Reviewed in the United States on February 24, 2025
This was an easy to set up, clear instructions and great transitional car seat. We ended up buying a second one for our second child.
A. Fernandez
Reviewed in the United States on January 2, 2025
(+) Reliable brand. Loved the UPPAbaby infant car seat so stuck with UPPAbaby when it was time to size up to a convertible car seat. Trust the brand and the safety.(+) Great quality. We have a less expensive Graco car seat for our secondary car and I can say that the UPPAbaby far exceeds in quality in terms of materials, ease of installation, and aesthetic.(-) I had zero complaints early on, but now that he's a full-blown toddler (i.e., heavier, bigger, longer legs, more active), I REALLY wish I had gone with a swivel seat instead. It's a very awkward maneuver to transfer toddler from my arms to car seat on a good day. On a bad day? UGH. Toddlers are awesome, but they're also pretty volatile, feral, hyper, and strong. On days that my tod is not fully cooperative (or on days that its raining), getting him into the car seat is very challenging and time consuming. I've seen other parents load kids into swivel car seats and it looks much easier.
Alex Palacios
Reviewed in the United States on November 4, 2024
This car seat is awesome. My son seems super comfortable in it and he will be able to use it for quite some time. It is very heavy and can be difficult to get setup correctly. We had to move it around in our car quite a bit to make sure it was secured correctly. (We have a small car and I’m not sure how this will vary car to car). Otherwise great seat and price.
Stephanie Nieri
Reviewed in the United States on April 4, 2024
It was time to upgrade our sons car seat as he’s outgrown his other one and we looked at many different options before deciding this was best. First, we trust uppababy brand. We have the infant car seat with the stroller and it was secure, safe, and easy to install. We loved our experience with the infant car seat, we figured we’d have a similar experience with the Knox. We love that you have recliner options for comfort and size.Few things to note though. One; your car size. This car seat is a big bigger (which we actually liked as it felt sturdy and safe) but we’ve been told it doesn’t fit in all cars. Two; it doesn’t have a swivel which we also liked as it seemed safer to us personally.If you have concerns on if it will fit in your car, we’ve been told customer service can help with those questions. We just ordered it and figured we’d try it first hand.All in all, great experience thus far and we’ve had it installed for a few weeks now.
Lizabeth Thompson
Reviewed in the United States on July 30, 2023
This product was very sturdy and fits within the uppababy brand well that we’ve come to love. Unfortunately this was just too large for our conventional family sedan. It was quite large for our Honda accord which made install a hot mess and It blocked the entire rear passenger window due to the high back design so we had to return it so if you have a small vehicle, I’d look elsewhere but I’d you have a larger car or big suv. This will work just fine for you
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