hearts-suit
SITS Fav SEAT

Diono Monterey 5iST FixSafe - Canada

In this review, we’ll take a close look at why the Diono Monterey 5iST booster may be a good option for your booster-aged child. It’s a nice option for parents who travel often since it folds up. Additionally, if you have non-removable headrests in your vehicle, this is one of the high-back booster options that will work. This is a great high-back booster option for higher-percentile kids as well.

Seat is good for you if:
  • You frequently use Lyft/Uber/Taxis.
  • You travel often.
  • Your vehicle has non-removable headrests.
Use caution if you:
  • You want a booster that converts to backless as well.
  • You want a lightweight option to move between different vehicles.
  • You need to fit 3 across in a vehicle.
Stand-out features:
  • It folds!
  • Rigid Lower Anchors
  • It has backpack-style straps to carry it around easily
Buy Now: 
SITS checks manufacturers and retailers daily to ensure these are the lowest prices available for these models.
Diono
Monterey 5iST
Buy Now
269.99

Our Review of the 

Diono Monterey 5iST FixSafe - Canada

In this review, we’ll take a close look at why the Diono Monterey 5iST booster may be a good option for your booster-aged child. It’s a nice option for parents who travel often since it folds up. Additionally, if you have non-removable headrests in your vehicle, this is one of the high-back booster options that will work. This is a great high-back booster option for higher-percentile kids as well.

Age

Our recommendation: From 5 years until it's outgrown (average 10-11 years old)

Type

A high back-only booster seat

When

From 5+, but the child must be mature enough to sit properly at all times

Buy Now: 
SITS checks manufacturers and retailers daily to ensure these are the lowest prices available for these models.
Diono
Monterey 5iST
Buy Now
269.99
Michelle sitting in a chair reading a book.

Stand Out Features of this Car Seat

It folds!

We love that this booster can fold. This makes it easy for parents who want to have an extra booster in their trunk for carpooling or for parents who travel often. It makes storing it in your house easier as well!

Rigid Lower Anchors

Lower anchors on the booster are optional. But if you don’t use the lower anchors, then you need to buckle the seat belt whenever the child is not riding in the vehicle with you. The lower anchors on this seat are rigid, which makes them easy to attach in many vehicles.

It has backpack-style straps to carry it around easily

After folding up the seat, you can utilize the attached straps to carry it around like a backpack. This can be a good option for parents who don’t own a vehicle but prefer to have a high back booster.

Seat is good for you if 

hearts-suit

You frequently use Lyft/Uber/Taxis.

The Diono Monterey 5iST works well in most vehicles. It folds up to make it easier to carry around as well. But the backpack-style straps also allow you to wear it instead.

hearts-suit

You travel often.

This seat folds up to the size of a carry-on so it can be stowed in the overhead compartment of many planes. This makes it a good option for parents who want to take a high back booster on their family trips.

hearts-suit

Your vehicle has non-removable headrests.

This booster is one of the few options that works well with non-removable headrests because it does not have to be flush with the vehicle seat. Other options that work with these kinds of headrests are Nuna Aace, Clek Oobr,  any of the other Diono boosters, and Evenflo’s boosters.

hearts-suit

You have a tall child.

This high back booster has 63″ limits, which is currently the maximum standing height limit available for boosters. It also has a very tall belt guide that can accommodate a child until their torso height is around 21″.

No items found.

Use caution if

c-warning

You want a booster that converts to backless as well.

This is a high back booster only. But it has a very tall headrest, so it will accommodate most children until they can fit properly in the seat belt.

c-warning

You want a lightweight option to move between different vehicles.

This booster weighs almost 19 pounds. With some boosters as light as 5 pounds, this is quite a heavy one. But it’s still not as heavy as many convertible car seats are, so this one may be ok for you!

c-warning

You need to fit 3 across in a vehicle.

I can’t imagine the Diono Monterey 5iST fitting 3 across in any vehicle, since it’s one of the widest seats on the market. Check out our blog post on fitting 3 across here to find some better options.

Quirks to be aware of

c-question

c-question

c-question

Child Fit Information

Installation Information

airplane

Airplane Use

Like all boosters, the Diono Monterey 5iST does NOT have aircraft approval. But because it folds up, this is still a great option for airplane travel. When folded, it’s small enough to take as carry-on luggage for most airlines. For help with all things airplane travel and car seats, check out our Wheels Up Course and private Facebook group.

SITS Bottom Line

In conclusion, the Diono Monterey 5iST high-back booster seat is a standout choice for parents who demand flexibility, ease of use, and top-notch safety for their children. Its foldable design, rigid lower anchors, and backpack-style carrying straps cater to the needs of busy families on the move. Whether you rely on Lyft, Uber, or taxis, frequently embark on family adventures, or have a vehicle with non-removable headrests, this booster seat has you covered. While it may not convert to a backless booster, its tall headrest and impressive height limits ensure your child’s comfort and safety. Remember, when it comes to travel, the Diono Monterey 5iST is a reliable companion, with its compact fold making it suitable for overhead compartments on planes. So, whether you’re hitting the road or taking to the skies, this booster seat is your trusted partner for safer and more convenient journeys with your child.

Buy Now: 
SITS checks manufacturers and retailers daily to ensure these are the lowest prices available for these models.
Diono
Monterey 5iST
Buy Now
269.99

Similar Car Seats

This car seat does not have any other versions.

Specifications

Diono

Monterey 5iST

Product Information

Weight: 18.7lbs

Width: 23"

Rear Facing Limits

Forward-Facing Limits

No Back Booster Limits

Highest Belt Guide Settings

21"

High Back Booster Limits

Height: 38-63"

Weight: 40-120lbs

Head Height Rules: ears must be below the top of the headrest

Other Important Details

Crash Replacement Policy

replace after a moderate or severe crash

Vehicle Seat Protectors

This brand allows Diono mats:

Diono Ultra Mat

Diono Grip It Car Seat Protector

Diono Super Mat

Other Accessories Approved For This Brand

Diono Ultra Dry Seat Child Car Seat Pad