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Diono Monterey 4DXT Vs 5iST Car Seat Booster - Comparison

Diono Monterey 4DXT Vs 5iST Car Seat Booster - Comparison

Posted in Diono Monterey 4DXT, Diono Monterey 5iST

Choosing the right booster isn’t always so simple. A good booster will last for years, and that makes it an even more important decision that’s really worth thinking through. These two boosters we’ll be talking about are both great choices!

Diono is a powerhouse in the convertible car seat industry, designing convertible car seats that are sturdy, safe, and well-priced.

The Monterey 4DXT is the original expandable booster from Diono, featuring 15 upgrades from the original DX convertible car seat, while the Monterey 5iST Fixsafe is a brand new convertible car seat. Looking into the Monterey 4DXT & Monterey 5iST? Let’s compare these two side by side! 

Side Impact Protection

The Diono Monterey 4DXT has 4 levels of side impact protection, which is definitely a lot, but the 5iST has double that: it has 8 levels of Safe+ side impact protection, for an unprecedented level of safety. The Monterey 5iST is not just side impact tested – it's also rollover tested and rear impact tested, with a Safe+ energy absorbing shell, & Safe+ airflow technology. So when lined up side by side, the 5iST beats the 4DXT when it comes to side impact protection!


Both of these are extremely comfortable. The 4DXT has 11 headrest positions and the 5iST has 12 positions. Both of these boosters expand in height and width, to give your little one the most comfortable seat for the ride!


The Monterey 5iST has a bonus over the 4DXT that it can be carried 3 different ways: with the backpack, shoulder or carry handle straps. 


With all its extra features, the 5iST convertible car seat is priced a little higher than the 4DXT, at $269.99. Prices on the 4DXT, the booster that came out first, range from $199.00 - $249.00.  

Both of these are great options if you’re looking for a convertible car seat! Shop now!


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