Top 10 Best High Back Booster Seats You Should Buy 2021 Reviews

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As your children get older, their need for a safe, comfortable car seat does not diminish. However, the type of car seat they need changes. Rather than continuing to use a lower, reclining car seat, they need a high back booster seat to help them sit of straight, be able to see out the windows, and be kept safe in case of an accident.

There are hundreds to choose from though. How can you find the best high back booster seats for your children?

Do not fear! We’ve done the work for you. Here are the top ten best high back booster seats, along with reviews and a buyer’s guide to help you provide the protection your children need while riding in your vehicle.

high back booster seats

Top 10 Best High Back Booster Seats On The Market 2021 Reviews

1 Britax Frontier – The Flatback Booster Seat

The Britax Booster Seat, like most of the best high back booster seats, is designed for children in transition, particularly in those fast-growing years between toddlers and big kids. It boasts easy installation and eliminates most of the hassle of rethreading the harness as your child grows. Instead, it is designed to be as easy to use as a seatbelt.

There is one caveat to this ease of use though. Several reviews have pointed out that if you use this booster seat in a vehicle seat that has a concave back on it, the harness will not tighten correctly.

Britax Frontier - The Flatback Booster Seat
Our rating:4.5 out of 5 stars (4.5 / 5)

  • Toddler to Big Kid
  • Easy installation
  • Eliminates most need for rethreading
  • 9-position harness with headrest
  • Problem with harness tightening if set it a concave vehicle seat

2 Graco Nautilus 65 LX – 3 Phase Booster Seat

Graco is a big name in children’s products. They have years of experience creating products to keep children safe at affordable prices. They manufacture some of the best high back booster seats available.

The Nautilus 65 LX is no exception. It is based around the idea of transitioning your child from 22 pounds to 100 pounds in three phases. Each of these phases is supposed to work with a simple harness adjusting system that shifts from three different positions, without having to rethread everything. In fact, Graco all but guarantees you will not have to rethread this seat ever.

Unfortunately, there seem to always be exceptions to the rule. Sure enough, some reviewers have claimed that they received their booster seat and needed to rethread it immediately. Whether this is refurbished seats being sold as new or simply quality control not keeping up with marketing, it has left some customers disappointed. After all, simplicity is the selling point with this high back booster seat.

Graco Nautilus 65 LX - 3 Phase Booster Seat
Our rating:4.3 out of 5 stars (4.3 / 5)

  • 3-in-1 harness booster
  • Front facing car seat harness booster (22 – 65 pound)
  • High back booster (30 – 100 pound)
  • Backless booster (40 – 100 pound)
  • Simply Safe Adjust Harness System
  • 3-position recline helps keep your growing child comfy.
  • Some seats require rethreading
Does Graco have any other booster seats you recommend?

3 Graco Affix Youth Booster Seat – For No-Headrest Vehicle Seats

Here is another great Graco product. This seat starts with slightly larger toddlers (40lbs) but will continue to be one of the best high back booster seats for children up to 100lbs.

It allows for easy self-buckling, letting your children learn to buckle themselves into the seat as they grow. The harness is designed to be adjusted in the front, simplifying the transition from smaller to larger children who use this booster seat.

The single problem reviewers have written about the Affix Booster Seat is that it will not work properly in a vehicle seat with a headrest. However, if the headrest is flat and flush with the seat, this high back booster seat may work for you after all.

Graco Affix Youth Booster Seat - For No-Headrest Vehicle Seats
Our rating:4.6 out of 5 stars (4.6 / 5)

  • For children 40-100lbs
  • Secure connection keeps sthe eat in place
  • Easy self-buckling for your independent child
  • Unique front adjustment
  • Side Impact Tested.
  • Material: Metal, Plastic
  • Problems using in seats with headrests

4 Britax Pioneer Combination Harness – Britax Runner Up

Here is a second version of the Best High Back Booster Seats from Britax. Most customers buy this seat as a secondary version of the Frontier and use it in their secondary vehicle. They do this because it is less expensive than the Frontier and hope to benefit from the company quality at less cost.

Unfortunately, this booster seat is harder to install than the Frontier. Additionally, the harness becomes unable to fully secure your child once they reach 45-50lbs, requiring the use of the seat belt. This booster seat is certainly useable, but it does not compete with the Frontier.

Britax Pioneer Combination Harness - Britax Runner Up
Our rating:4.2 out of 5 stars (4.2 / 5)

  • Toddler to Big Kid
  • No rethreading
  • Quick-adjust 9-position harness
  • 2 layers of side impact protection
  • Steel frame, impact absorbing base
  • Forward-movement reducing v-shaped tether
  • Fits 25-110lbs
  • Hard to install
  • Problems strapping in some children 50lbs+

5 Chicco KidFit – Kids Comfort Booster Seat

Chicco is well known for creating plush and comfortable car seats, ranking them among the Best High Back Booster Seats. The KidFit is a prime example of this ingenuity at work.

The double foam padding provides a contoured design that maximizes comfort for your child. There are 10 different positions you can arrange it into as your toddler grows. Also, parents love how easy it is to install and use. This is a very lightweight and popular booster seat.

However, there is one small complaint some reviews make. The plastic piece on the side of the booster seat does not always hold the seat belt well, making it difficult to secure.

Chicco KidFit - Kids Comfort Booster Seat
Our rating:4.7 out of 5 stars (4.7 / 5)

  • DuoZone head and shoulder side-impact protection
  • 10 positions for growing children
  •  Easy to get in and out
  •  ErgoBoost double foam padding and contoured seat
  • The plastic piece on side of the seat does not always hold seat belt well
Are there any booster seats for bigger kids?

6 Diono Monterey XT – The Booster for Big Kids

Diono makes one of the best high back booster seats for bigger bodied kids. Kids that fit the ranges of 40 to 120lbs can come in a variety of shapes and sizes and sometimes booster seats run too narrow for comfort.

The Monterey XT provides a wider base for your child. It is comfortable and affordable and will safely transition your child as they grow from 38 to 63 inches tall. The only downside to this booster seat is that slimmer children have a much more difficult time fitting in it securely.

Diono Monterey XT – The Booster for Big Kids
Our rating:4.3 out of 5 stars (4.3 / 5)

  • The safety that transitions as your child grows
  • Accommodates growing children 38” to 63” tall weighing 40 to 120 lbs
  • Comfortable and affordable
  • Provides years of reliable protection
  • The base is very wide
  • Does not fit smaller kids as well

7 Evenflo Chase Harnessed Booster – Harness to Belt Booster

Evenflo is another company that creates quality car seats and some of the best high back booster seats on the market. The Evenflo Chase is no exception.

This combination booster car seat fits children from 22 to 110lbs and transitions them from a five-point harnessed seat to a belt-positioned seat as they grow. Because of this transition, you can expect to get several years of use from this booster seat.

However, since this is designed as a transitional car seat, it does not recline as well as seats meant for younger children.

Evenflo Chase Harnessed Booster - Harness to Belt Booster
Our rating:4.3 out of 5 stars (4.3 / 5)

  • 2-in-1 Combination Booster Car Seat
  • Fits children from 22-110lbs
  • Converts from a 5-point harnessed to belt-positioning car seat
  • Does not recline as well as others

8 Graco Highback Turbobooster – Layered Design

Here is the second Graco car seat to make it on the Best High Back Booster Seats list. Like the Diono booster seat, this design runs a little wide and starts with 30lbs kids instead of 20lbs like many of the other car seats. The inside width is 16.5 inches, which may be too wide for slimmer children.

One of the key components, according to reviewers of this booster seat, is that it seems to have layers. It has a layered headrest. Additionally, the back seems to act as a layer as well. The seat back is attached to the bottom, but not to the car seat itself, so it can be easily removed as you graduate your child up from a toddler in a harnessed car seat to a big kid, depending more on the seat belt.

Graco Highback Turbobooster - Layered Design
Our rating:4.5 out of 5 stars (4.5 / 5)

  • Safely transport your big kid from 30-100 lb
  • Seat back and bottom stay connected
  • Easy to carry
  • Car Seat Width Inside -16.5 inches
  • Multi-layer headrest for comfort
  • Easily converts to backless booster for years of use
  • Back does not attach to car seat
  • Runs wide in design
Do any other companies have removable back seats?

9 Evenflo Big Kid AMP – Removable Back Transition Seat

This is the second Evenflo booster seat on the list of Best High Back Booster Seats. This is another example of a transition car seat with a removable back.

In addition to the removable back, this seat has an easy one-hand adjustment that moves the seat between six different positions to help grow right along with your child. The Big Kid AMP also comes with two cup holders for drinks and is padded with an energy absorbing liner keeps your child cool and comfortable.

Among reviewers, the only complaint has been that some bigger kids appear less secure in the seat and it could benefit from having a latch to keep them secured better.

Evenflo Big Kid AMP - Removable Back Transition Seat
Our rating:4.5 out of 5 stars (4.5 / 5)

  • Machine washable pad keeps seat looking clean
  • Removable back for easy transition to a no-back booster
  • Easy one-hand adjustment
  • 6-position height adjustment
  • 2 cup holders for drinks
  • Energy absorbing foam liner
  • Could benefit from a latch

10 Cosco Finale DX – Economy Booster

Cosco is another leading brand of child safety accessories. The Finale DX is another version of the five-point harness that transitions to booster seat model. Cosco’s version focuses on removable and easy-to-clean seat pads and cupholder accessories.

This seat meets all the federal ASTM and JPMA safety standards. However, some reviewers have noted that the plastic parts of this seat are less durable than some of the competitor booster seats. That said, there are enough savings in overall value to include this on our list of Best High Back Booster Seats.

Cosco Finale DX - Economy Booster
Our rating:4.3 out of 5 stars (4.3 / 5)

  • A five-point safety harness that converts to a belt-positioning booster seat
  • Accommodates children from 30 to 100 pounds
  • Lightweight seat and easy to move from car to car
  • Removable and dishwasher-safe cup holder
  • Removable, easy-to-clean booster car seat pad
  • Meets or exceeds federal, ASTM, and JPMA safety standards
  • The seat is less durable than competitors

Best High Back Booster Seats Buyer’s Guide

The number one concern with the best high back booster seats is safety. All of these booster seats have been tested and most have reviewers who have shared a testimony of their helpfulness in the case of an accident. If the seat could not perform its most basic function, it would not be on this list. However, some of the safety-related functions go beyond government testing and may depend upon certain aspects of your child as well.

For instance, children of different sizes will be kept more secure in some seats more than others.

best high back booster seats

Weight and Size Capacity

All of these seats are transitional seats. This means they cover a range of height and weight capacity for your child. However, some have lower or higher ranges than others.

On the lower, lighter end, the Graco Nautilus, the Evenflo Chase, and the Chicco Kidfit all are safe for children just over 20lbs. These seats all will stay with your child up to about 100lbs.

For kids who may have larger bodies (even if they are not heavier), there are several good options as well. The Diono Monterey XT is made for bigger kids. You can also check out the Evenflo Big Kid AMP and Graco Highback Turbobooster. Any of these should be able to accommodate bigger kids, and several of them start out at a 40lb weight capacity and go up above 100lbs.

Ease of Use

If safety is the number one concern of parents, ease of use is easily number two. it comes in two kinds of categories: installation and transitioning between kid sizes.

As far as installation goes, most of these seats are fairly easy to install in ideal vehicle seat conditions. That last phrase, “ideal vehicle seat conditions” is what makes all the difference.

high back booster seats reviews

In short, most of the seats made for bigger kids tend to fit in a wider variety of vehicle seats. Evenflo, as a company, probably does the best out of this top ten best high back booster seats list. The Cosco and Chicco seats tend to fit in most places as well. The Cosco is actually designed to fit three in a back seat. Additionally, the Diono seems to work in most conditions.

The Graco and Britax both have complaints about being difficult to install or not fitting in vehicles where the seat back has any kind of curve in it. All of their models on this list have issues from the reviewers regarding the trouble they have fitting in certain vehicle seats.


Comfort is probably the child’s first priority, but it often fits further down the list of priorities for parents. If you are looking for comfort, Chicco is the brand to check.

Chicco has a reputation for developing plush car seats, and the KidFit lives up to that expectation. If you want to look elsewhere among the best high back booster seats as well, the Evenflo seats are padded with energy absorbing foam liners that help keep your child cool in the seat.


When shopping for the best high back booster seats, the two main factors you need to consider are the size of your child and the shape of your vehicle seats. If you can zero in on seats that will accommodate your child’s width (as well as height and weight) and match that to a seat that will fit the shape of your back seats, you can quickly narrow your options down to a few choices. From there you can consider price, comfort, and durability as you make your choice in buying the best high back booster seats for your children.

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