HELP PLEASE And pretty pretty please dont suggest car seats for littles, bc im over their "help"

Why do you hate csftl?

I dont hate them, they just werent helpful for my particular question

Your child's stats, car, & budget are good info to have but overall, the harmony defender is the slimmest harness to belt booster I've found.

Diono doesn't make great combo seats bc the booster mode is outgrown just about the same time the harness is outgrown. If your little was younger & still had year or more rearfacing that'd be a good option.

What does the harmony defender go to? I read it was 57" but then it'd be the same as diono...

It is the same, but the radian also has the "top of ears below shell" max so the kiddo may not make it to 57" before outgrowing its

The defender is also over $100 cheaper.

All other combo seats are 2+ inches wider too. :/

Thank you that gives me somewhere to start.

Hes 4, 40-42 pounds and 40-42 inches.

Im looking for a combo seat, as i prefer him to be in a harness longer, but not sure what my budget is, bc its usually whatever doesnt make dh look green lol

Not for a week or so at least.

Its not an emergency situation or anything, tho.