The Diono Monterey 4DXT expandable booster car seat features 15 upgrades in safety comfort and style from our original Monterey XT. From the remodeled headrest and enhanced side impact protection to the contoured seat base and breathable side panels We’ve considered every detail. Suitable from 40 - 120 lbs approx. 4 - 12 years) expect 8 years of safety from just one booster seat. Monterey 4DXT adjusts and expands as your little one grows to offer all-round protection.

For your big kids the seat easily converts from a high back booster to a backless booster seat. With a 30mm reduction in the seat back we’ve redesigned the Monterey base to improve fit in any vehicle without reducing the internal seating capacity. This also helps parents to access the vehicle seatbelts as well as promoting independent buckling when your little one is ready.

The height and width of the Monterey 4DXT are adjusted independently providing 69% increase in occupancy space as they grow. The ergonomically contoured car seat base improves the child seating position with luxury foam cushioning for child comfort with two space saving cup holders that can simply fold away when not in use. Extra deep aluminum reinforced sides and a combination of EPP and EPS foam provide 3 layers of enhanced side impact protection for their head shoulders and torso.

The Monterey 4DXT is also equipped with LATCH connectors and front adjusters to connect the booster seat quickly and securely to your vehicle in seconds enhancing both safety and stability. With luxurious fabrics inspired by European fashions and exo-shell outer panels the Monterey 4DXT makes a super stylish addition to your vehicle’s interior.

The Monterey 4DXT comes in a range of bold colors meaning there is a Monterey that suits every child. And with an easily removable and machine washable cover the Monterey 4DXT is easy to look after and keep clean day in day out. So when it comes to your next booster look to the Monterey 4DXT to take your child on their journey in safety and style.

Baby, we want you to know…​

The box might have some wear, but it’s what’s inside that counts.