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For When Your Big Kid Needs A Boost

For When Your Big Kid Needs A Boost

For The Joy Of The Journey

Award-winning High Back Booster Seats

Lightweight, slim fit, expandable, buckle friendly, spacious, side impact protection... Whatever you're looking for our range of high back boosters are fully featured, designed to grow and built to last for 8 years one booster.

8 Years One Booster

A custom fit as your child grows from 40 - 120 lbs

Diono high back boosters have won multiple awards for their commitment to safety and innovative design. The original expandable booster seat Monterey® was one of the first high back boosters on the market with both height and width adjustment. Every year we build on this legacy, painstakingly upgrading the Monterey® family so it continues to be loved by families around the world.


Reinforced Head Support

The further a child's head travels in the case of a collision the greater the risk of injury. Diono high back boosters are all designed and engineered with reinforced head support, to provide head containment and minimize side movement. As your child grows the head support is adjusted to ensure that their head is protected throughout the life of the booster.


Tested over and above safety standards

All Diono products are engineered and tested to the highest safety standards to keep children as safe as possible.


Total child comfort

Ergonomically designed with contoured shapes and memory foam cushioning, Diono high back boosters ensure your child's comfort on every journey. Not forgetting that extra padding around the headrest for comfortable snoozing on the move.


Side Impact Protection

Side impact collisions can result in high injury rates in passengers. That's why we design all our High Back Boosters with deep, reinforced side for enhanced side impact protection.

Meet The Family

Monterey® 5iST FixSafe™

Compact fold to full size booster


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Monterey® 4DXT

Astronaut approved, parent trusted

from $199.99

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Cambria 2

Green fingers approved, parent trusted


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Solana 2

Wizard approved, parent trusted


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Find The Right Booster For You

Monterey® 5iST FixSafe™

Compact fold to full size booster

  • MSRP: $269.00
  • Weight Limit: 40 - 120lb
  • Headrest Positions: 12 positions
  • Side Impact: Yes
  • Expandable Sides: Yes
  • Installation: FixSafe rigid latch connectors
  • Cup Holders: 1
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Cambria® 2

Slim fit, lightweight and equipped with easy click rigid latch connectors for safe and secure installation every time.

  • MSRP: $119.99
  • Weight Limit: 40 - 120lb
  • Headrest Positions: 6 positions
  • Installation: rigid latch connectors
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Monterey® 4DXT

Features 15 upgrades from Monterey® XT including new automotive-inspired fabrics that cover the entire vehicle seatback, 4 layers of side impact protection and breathable side panels to enhance airflow.

  • MSRP: $199.99
  • Weight Limit: 40-120lb
  • Headrest Positions: 11 positions
  • Side Impact: 4x layers
  • Expandable Sides: Yes
  • Installation: fix connectors & front adjusters
  • Cup Holders: 2
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