It is no easy feat to fit three children in the backseat! Often, parents of triplets (or three children of multi-age) worry about how they will safely fit all of their children in a small car. Rather than spending tens of thousands of dollars on a new vehicle, a better (and far less expensive) option is to look into purchasing a set of narrow high back booster seats. That way, all three of your little ones can sit together comfortably and safely in the small car that you already own!
The Best Narrow High Back Booster Seat with 5 Point Harness
Brand & Product Name
What is a narrow highback booster?
A narrow highback booster seat is a child safety seat that helps position your older child in a car. Seating in a typical car is designed for an adult. For a child to safely sit in such seats, they need to be positioned correctly, even when they have outgrown a typical car seat. For this reason, high back boosters are used for positioning.
How to Safely Install a Highback Booster Seat
Is there a narrow booster seat that will fit three across?
Of course! All of the boosters listed here should fit three across in most cars. All of these slimline high back booster seats measure 20” across or less.
How do I know if my child is ready for a narrow 5 point harness booster?
If your child is over two years old and over 22 lbs they can sit in one of these narrow highback boosters. Younger and smaller children should not be in a booster just yet. If your child is between ages 2 and 5, they likely need to use the 5 point harness feature. After that, the booster can be used as a seat belt positioner until the weight or height limit is hit!
Best Narrow Booster Seat
We have looked at all of the options available and selected the best narrow booster seats (and they all have 5 point harnesses!). Check out our comprehensive reviews below.
1. Graco Atlas 65 2-in-1 Harness Booster Car Seat
Graco is well known to be a top leader in car seat safety. If you are looking for a well-padded, safety tested seat for your kids, this high back booster is a solid choice.
The Atlas is easy to install and should fit three across in most cars. It has a steel-reinforced frame to provide maximum protection for your child, which makes it a little heavier than the average seat. One nice thing about this seat is how easy it is to clean. You can wash the cover and replace it without any fuss or trouble threading the straps, which saves you time!
Graco Atlas 65 2-in-1 Harness Booster Car Seat
2. Cosco Finale DX 2-in-1 Booster Car Seat
This seat was specifically designed by Cosco to fit three across in most cars, making it nearly guaranteed to work well for your family.
The Finale is a lightweight high back booster designed to work for your child for many years. It can easily be moved from car to car (no need to buy an extra seat for your second car or babysitter), and it has special fabric to make the ride more cozy for your kids. As a bonus, this seat comes in four cute colors for your children to choose from!
3. Disney KidsEmbrace Harness Booster Car Seat
Looking for something a little different to get your fussy kid to enjoy a car ride? This Disney high back booster chair is made just for you.
You probably haven’t seen a seat quite like this before! Designed to entice your child into enjoying their seat, it comes in a variety of disney characters and superheros. Don’t let the fun design fool you though. This high back booster is safety tested, likely to fit three across in your car, and well made to last for years.
4. Cosco Highback 2-in-1 Booster Car Seat
This Cosco seat has been a top contender on the market for several years. Now that there is a newer model (reviewed above), you can find the 2-in-1 at a deep discount. If you are looking for a narrow high back booster that won’t cost you much even when you need to buy three, this might be a good choice for you.
This 2-in-1 will easily fit three across in practically any car. At under 19” wide, it is the narrowest seat on our list. If you have a compact car, the Cosco might be your best bet. It will also fit well in an airplane, if you often travel. Not only will this work well with your growing child, but the entire cover can be thrown in the washing machine, making it easy to clean as well.
5. Evenflo Maestro
This Evenflo seat has a lovely design and is made by a company well known for its rigorous safety testing.
The Maestro is a rare find! Both affordable and slim, it should fit three across in nearly any backseat. This seat is also unique in that it fits children up to 110 lbs, giving it the biggest weight range on our list. You will literally get years of use out of this seat, and likely never have to buy another car seat again!
If you need a narrow high back booster seat with 5 point harness, you can’t go wrong with any of the seats on the list! Overall, both the budget seats and the more expensive seats will get the job done. It just depends on what features your family needs. If you are looking for the best narrow high back booster seat with 5 point harness, any of these seats would be an excellent, safe, and comfortable choice!