This lets it grow with your child without sacrificing safety

https://litecomparison.com/diono-monterey-xt-vs-2xt/

Rear-facing in a 5-point harness is 5 times safer for a 40-pound 3-year-old than forward-facing (even if their feet touch the seat). What I would look at is the Diono Radian. Booster seats can be used by normal-sized children as early as age 6, or even younger if they are very big. He should be facing forward in a five-point harness if he can't face backward. There is a latch system. See how the front has two straps that stick out? These help tighten the straps (tethers). At the base, there are two hooks that can be used to secure things. Even though my truck doesn't have a latch, I was still able to attach the hooks to the frame. Even though they say they aren't necessary, they hold the seat in place.

There is a Latch System. Notice how the front has two straps that stick out? The straps will be tightened with those (tethers). There are two hooks on the base that can be used to attach it to something. Even though my truck doesn't have a Latch System, I was able to attach the hooks to the frame. Even though they say they aren't needed, they do hold the seat in place. JUST 14.3 POUNDS, which is VERY LIGHTWEIGHT. Since Monterey 2XT is light, you can easily move it from one vehicle to another. SUPERIOR SIDE-IMPACT PROTECTION: Layers of reinforced high-impact aluminum provide better side-impact protection for the head, shoulders, and torso.

11 POSITION HEADREST: Growing children can add 6.5 inches to their height with a simple one-handed adjustment. your child's safety and comfort come first The height of the headrest can be changed up to 6.5 inches with one hand, and the width of the seat can be changed up to 20 inches with a simple dial on the back. The Diono difference comes from smart design and safety features that have won awards.

11 POSITION HEADREST: Growing children can add 6.5 inches to their height with a simple one-handed adjustment. your child's safety and comfort come first The height of the headrest can be changed up to 6.5 inches with one hand, and the width of the seat can be changed up to 20 inches with a simple dial on the back. The Monterey XT is one of the most flexible car seats you'll find. It's small, light, and has sides that can expand and a headrest that can be changed to fit your child at any age.
The number of people who can sit in THE ORIGINAL EXPANDABLE BOOSTER goes up by 69% as your child grows.

This two-in-one seat is easy to turn into a booster seat without a back because it has a wide, curved seat base and two cup holders that can be pulled out. The Diono difference comes from smart design and safety features that have won awards. The Monterey XT has our best side impact protection with an aluminum-reinforced head support and energy-absorbing EPS foam. This lets it grow with your child without sacrificing safety. With its easy-to-use connectors and front adjusters, the Monterey XT can connect to your car quickly and securely, making it more stable and safe and making it easier for parents to switch cars.