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Monterey® 4DXT

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220,00€ - 299,00€

Group 2/3 High Back Booster Seat

220,00€ - 299,00€

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Additional 2-Year Warranty

Receive an additional 2-year warranty on all car seats and strollers purchased from

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Monterey® 4DXT

We’ve taken the award-winning Monterey® booster seat and painstakingly engineered 15 upgrades to create the next generation of booster. Suitable from 15 - 36 kg or approx. 4 – 12 years.


  • 15 UPGRADES FROM MONTEREY® XT - Includes automotive inspired fabrics that cover the entire booster seat back and breathable side panels to enhance airflow to keep your child cool on the move.
  • 4 LAYER SIDE IMPACT PROTECTION - Extra deep aluminum reinforced sides provides 3 layers of enhanced side impact protection for their head, shoulders and torso.
  • EXPANDABLE HEIGHT & WIDTH - 11 headrest positions and expandable side walls provides 69% increase in occupancy space as your child grows.
  • QUICK & SECURE INSTALLATION - Equipped with FIX connectors and front adjusters to securely connect the booster seat to your vehicle in seconds, enhancing safety and stability.
  • TWO SPACE SAVING CUP HOLDERS - Features two retractable cup holders to hold those important road trip drinks and snacks.

Product Specs

  • Seat Weight: 8.48 kg
  • Product Height: 69 cm
  • Product Width: 54 cm
  • Product Depth: 41 cm
  • Minimum User Weight: 15 kg
  • Maximum User Weight: 36 kg
  • Minimum User Weight - Forward Facing: 15 kg
  • Maximum User Weight - Forward Facing: 36 kg
  • Maximum User Height: 160 cm

Care & Maintenance

Covers: Machine wash cold, line dry. Shell and Components: Spot clean

Warranty Information

12 months standard warranty

The Diono Difference

All Diono boosters are designed and engineered to go over and above safety standards.
One thing all parents know, kids will keep on growing! Diono boosters are suitable from 15 - 36 kg (approx. 4 - 12 years) for 8 years of use.
The Diono Monterey® is the original expandable booster seat, engineered with both height and width adjustment for a custom fit at every age.
Integrated FIX connectors and front adjusters make for a simple and safe installation every time.