Chicco GoFit booster seat (20008, near BreadFurst)

Purchased in 2022, good until June 2030, no car accidents, clorox wiped.

Chicco GoFit backless booster seat.

It’s technically for kids 4yo+, but we kept ours in booster with a five point harness until she turned 7 and was ready to sit reliably in her seat without playing with the car belt or wiggling out for fun.
So my recommendation is

I liked these ones because they have more cushion than the Graco backless boosters, and are easy to move between cars.