Diono monterey® XT Booster Seat

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$299.00 $278.99 including GST
($242.60 excluding GST & international orders)
Or 10 interest free payments from $27.90 with What's this?

Dependable safety for growing children.

The monterey® XT booster keeps children from 18-54 kg and 97-160 cm tall safe and secure with aluminum reinforced sides lined with energy absorbing EPS foam. This seat was designed to accommodate growth spurts without sacrificing protection.

We know how to keep back seat snackers happy. This booster comes with retractable cup holders to keep drinks or snacks upright and within reach.

Side impact protection:
This booster comes with deep, aluminum reinforced sidewalls that provide excellent side impact protection and the energy absorbing EPS foam surrounds your child for ultimate safety.

Adjustable, supported fit:
With 11 headrest positions, this booster adjusts for a proper fit and improved comfort for growing children. A simple to use dial on the back adjusts the width of the seat to fit a child’s shoulders up to 50 cm wide.

Quick, secure installation:
Install the monterey® XT booster securely and in seconds thanks to integrated LATCH connectors and front adjusters, monterey® XT can also be used as a backless booster and packs flat for travel and storage.

Key Features:

  • Fits children from 18-54 kg and 97-160 cm tall
  • Extra deep aluminum reinforced sidewalls add side impact protection
  • EPS foam lining for more safety and comfort
  • Adjustable back expands to fit shoulders up to 50 cm wide
  • Adjustable headrest offers 11 positions up to 160 cm tall
  • Easily converts to backless booster
  • LATCH system securely installs in seconds but LATCH use is not required
  • Angled bottom seat prevents submarining
  • Longer bottom seat supports growing legs
  • Retractable cup and snack holders fold out for convenience
  • Flat packing for travel and easy storage

Product Specifications:

  • Height 66 cm
  • Width 50.8 cm
  • Depth 40.6 cm
  • Weight 6.3 kg

Customer Reviews

Based on 18 reviews

I found this booster very easy to install and it will fit my very tall 8 year old granddaughter as a full booster for a while yet and then will be used as a half booster for her until her younger brother and cousin need it. She has however complained that it is not very comfortable as it catches her across the top of her shoulder blades where the adjustable headrest meets the back piece. There seems to be quite a hard ridge just there and perhaps it is that she is just at that height that there is a problem however I was a bit disappointed with that part. Overall it seems a good seat for the price.

Awesome car seat

Well this is a brilliant car seat that will see my daughter safe and secure until she doesn’t need one anymore. So easy to install with the latch/isofix option. It’s a little wide for my Nissan Juke so I have to fiddle a bit when doing up the seatbelt but it’s worth for the quality. Great service from Winkalotts to WLG as well.


We needed to get a bigger seat for our 6 year old she is a bigger girl with wide shoulders this seat fits her so well and she still has more room to grow. The seat was very easy to install.
I definitely recommend this seat!!

4.75 *

Easy to install and adjust. Provides excellent support for our taller, slim 5 year old, with plenty of room left to adjust for growth. Seat seems to fit well into a variety of different vehicles while still sitting the child upright, with seat belt in a comfortable position. The top section does a great job supporting a sleepy child's head, without compromising body position. 5 year old reports it is the "comfiest booster ever".
Why not 5 stars? Within two weeks of use, some of the seat cover stitching has come loose. Not a deal-breaker, just a surprise to see, given the quality of the rest of the seat.
Definitely would recommend the Diono Monterrey booster, so if you are hesitating - go for it!

Great brand, awesome carseat

This is the third Diono seat we have purchased and we love them. We had to replace our Radian RXT due to a car accident, and decided to move to the booster for our six year old. It's such an easy seat to use with isofix, easy release to pull the car seat out so I can get my hands in behind it, and the cup holders are a bonus. We love this one because it has extra protection in case of an accident. And our daughter loves the plum colour, so it's a win-win.

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★ Reviews ★

Let our customers speak for us.

1395 reviews
Prompt delivery

Not used yet but looks like a good product that is easy to use when travelling. Very prompt delivery and good price.

Great product

Lovely warm and soft changing mat. Great price. Prompt delivery.

Prompt delivery

Not used the mattress yet but great to be able to get one via this store. Very prompt delivery and a good price. Thanks.

A present for our 21 month Old granddaughter and she was off as soon as she saw it. Easy to assembly, excellent
quality. We changed our mind on colour after purchase and this was dealt with promptly and had we it in our hands in a few days. Very pleased.

So pleased with our purchase, the basket is a must with balance bike. Well made and very cute.