Graco Tranzitions 3-in-1 Harness Booster Car Seat - Proof
$139.99 was $149.99
New lower price save $10.00 (7% reduction)
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4.5 out of 5 stars with 3562 reviews
quality: 4.4 out of 5
comfort: 4.26 out of 5
value: 4.28 out of 5
durable: 4.27 out of 5
ease of installation: 4.07 out of 5
81% would recommend
921 recommendations
5 out of 5 stars
Thumbs up graphic, would recommend
1 April, 2026
Great car seat
I’m not sure why this seat is moving for other people but it hasn’t done that for us. Our son is very secure in it and he loves this seat. He has 4 different seats in different cars due to grandparents and us and this is one of his favorite. He’s a slim kid and he fits well. We are actually considering buying another one of these for travel so we don’t have to worry about taking ours out of the cars. Each car is different but if you are concerned about it moving just take it to a fire station and they’ll check it for you sometimes it’s not the seat.
1 out of 5 stars
Thumbs down graphic, would not recommend
26 March, 2026Verified purchase
Dont buy this
Super wobbly and won’t tighten no matter how hard I try. I wouldn’t recommend if you care about the safety of your child. also the material started deteriorating after 2-3 months. I’m so annoyed
1 reply from Graco Consumer Care team - 7 days ago
Hello, thank you for your feedback on our Tranzitions 3-in-1 Harness Booster Car Seat and we are sorry that it did not meet your expectations. Satisfaction of our consumers is important to us, therefore we would be happy to help you resolve this issue. Please reach us at 1-800-345-4109 Consumer Care team 9AM to 5PM EST, or you can also use the link below to contact us via email. We are looking forward to hearing from you! https://www.gracobaby.com/support/contact-us Thank you!
5 out of 5 stars
Thumbs up graphic, would recommend
9 March, 2026Verified purchase
(no review title)
Easy to install, slim, and comfortable for my 4 year old son
3 out of 5 stars
8 March, 2026
Base is too wide
Like the versatility but I wish the base was more narrow, wish it clipped in to Latch system like our Chicco. Base is a little too wide in my Acadia and terrain. Fits my husbands Chevy truck fine.
5 out of 5 stars
Thumbs up graphic, would recommend
7 March, 2026Verified purchase
Great Booster
This fits in the car well and is easy to install.
5 out of 5 stars
Thumbs down graphic, would not recommend
4 March, 2026Verified purchase
(no review title)
a really nice car seat
5 out of 5 stars
Thumbs up graphic, would recommend
4 March, 2026Verified purchase
You need it
Love it
5 out of 5 stars
Thumbs up graphic, would recommend
3 March, 2026Verified purchase
(no review title)
Excellent! Does not move around and is great quality. Would recommend to other buyers!
5 out of 5 stars
2 March, 2026Verified purchase
(no review title)
Good product
1 out of 5 stars
Thumbs down graphic, would not recommend
1 March, 2026Verified purchase
Needs to be recalled
This car seat needs to be recalled. I have a 2019 suv, and it would not tighten!! with the latch system OR seatbelt. Going through reviews now, it seems like a lot of people have this issue. Returning asap.
1 reply from Graco Consumer Care team - 30 days ago
Hello, thank you for your feedback on our Tranzitions 3-in-1 Harness booster and we are sorry that it did not meet your expectations. Satisfaction of our consumers is important to us, therefore we would be happy to help you resolve this issue.Please reach us at 1-800-345-4109 Consumer Care team 9AM to 5PM EST, or you can also use the link below to contact us via email. We are looking forward to hearing from you! https://www.gracobaby.com/support/contact-us Thank you! Graco Team
1 out of 5 stars
Thumbs down graphic, would not recommend
28 February, 2026Verified purchase
BUY A DIFFERENT CAR SEAT
Don’t listen to the promotional reviewers. Spend your money on something else. My toddler is able to easily unbuckle the top strap. The top harness is fixed in a single position, making it uncomfortable for a growing toddler. And like others have said, it slides around and doesn’t anchor to the car seat properly.
1 reply from Graco Consumer Care team - 1 month ago
Hello, thank you for your feedback on our Tranzitions™ 3-in-1 Harness Booster and we are sorry that it did not meet your expectations. Satisfaction of our consumers is important to us, therefore we would be happy to help you resolve this issue.Please reach us at 1-800-345-4109 Consumer Care team 9AM to 5PM EST, or you can also use the link below to contact us via email. We are looking forward to hearing from you! https://www.gracobaby.com/support/contact-us Thank you!
5 out of 5 stars
Thumbs up graphic, would recommend
23 February, 2026Verified purchase
(no review title)
Amazing! Easy installation.
5 out of 5 stars
Thumbs up graphic, would recommend
4 February, 2026Verified purchase
Comfy, lightweight, and safe
We bought this car seat specifically for traveling, and it has been a game changer. The lightweight design made airport travel so much easier—carrying it through security, boarding, and installing it in rental cars was quick and stress-free. . Safety was our top priority, and this seat gave us peace of mind with its solid construction and secure fit. Installation was very easy and you didn’t need any extra tools. It’s comfortable for our child and fits well in different vehicles, making it perfect for trips. Overall, this is an excellent travel car seat for families who want something easy to carry without compromising on safety. Highly recommend for anyone who travels often with kids.
1 out of 5 stars
Thumbs down graphic, would not recommend
3 February, 2026Verified purchase
(no review title)
Great slim design. However, this thing rattles to no end. It’s the mechanism to adjust the headrest height. every. single. bump or vibration. rattle. rattle. rattle. oh. and it clips to the anchors, not like a buckle. have fun moving the car seat.
1 reply from Graco Consumer Care team - 2 months ago
Hello, thank you for your feedback on our Tranzitions 3-in-1 Harness Booster) and we are sorry that it did not meet your expectations. When the seat is not in use , you can lower the headrest to prevent trhe rattle. Satisfaction of our consumers is important to us, therefore we would be happy to help you resolve this issue.Please reach us at 1-800-345-4109 Consumer Care team 9AM to 5PM EST, or you can also use the link below to contact us via email. We are looking forward to hearing from you! https://www.gracobaby.com/support/contact-us Thank you! Graco Team
1 out of 5 stars
Thumbs down graphic, would not recommend
28 January, 2026
(no review title)
Please listen to the reviews on how the seat slides around or doesn’t stay tight and secure! It may be different in every car but this car seat did not stay tight no matter what i did! i wouldn’t suggest buying it when there are better options out there!
1 reply from Graco Consumer Care team - 2 months ago
Hello, thank you for your feedback on our Tranzitions 3-in-1 Harness Booster and we are sorry that it did not meet your expectations. Satisfaction of our consumers is important to us, therefore we would be happy to help you resolve this issue.Please reach us at 1-800-345-4109 Consumer Care team 9AM to 5PM EST, or you can also use the link below to contact us via email. We are looking forward to hearing from you! https://www.gracobaby.com/support/contact-us Thank you! Graco Team
5 out of 5 stars
Thumbs up graphic, would recommend
27 January, 2026Verified purchase
(no review title)
Moved my kids from their infant seats to this and they love it! As a mom I feel they’re very safe if involved in an accident and love the cupholder location
5 out of 5 stars
Thumbs up graphic, would recommend
24 January, 2026Verified purchase
Great!
The straps are long and adjustable. It’s not too heavy. Simple to install. Everything you need!
5 out of 5 stars
Thumbs up graphic, would recommend
11 January, 2026Verified purchase
(no review title)
Clean and a great product
5 out of 5 stars
Thumbs up graphic, would recommend
8 January, 2026Verified purchase
Saved My Child's Life
This carseat saved my daughter's life! We were hit headon in a terrible car accident, but my 3 year old was completely unharmed thanks to this seat. I will be buying this one again!
5 out of 5 stars
29 December, 2025Verified purchase
(no review title)
Grate in samall cars