Monterey 4DXT - Grey Dark

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Monterey 4DXT - Grey Dark

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Back in 2008, the original American expandable booster seat was created by Diono. Fast forward to today, the next evolution in a long-standing legacy is here. Diono has taken the award-winning Monterey and painstakingly engineered 15 upgrades to create the Monterey® 4DXT. From the remodeled headrest, enhanced fabric covering, contoured seat base and breathable exo-shell panels, they've considered every last detail to create a contemporary new look.


  • 15 Improvements: Diono has introduced 15 upgrades in safety, comfort and style to provide the next evolution in a long-standing legacy.
  • Adjustable Protection: The height and width can be adjusted independently for safety that envelopes their head and shoulders up to 12 years of age. Forward-facing 40-120lbs(18-54kg) or up to 160cm.
  • 3X Superior Side Impact Protection: The new 4DXT features the 3-layer Side Impact Protection system built in. From EPP foam coating, to the molded rigid shell casing and EPS coated outer shell, we’ve lovingly engineered every detail to keep your little one safe.
  • Optimized Fit: 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.
  • Always Travel Ready:The 4DXT is super portable, lightweight (16.98lbs/7.7kg), easy to store and with our great flat pack feature it makes the perfect travel companion for your little one.
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