Quoting Mom of 2 Monkeys:" My son is 4yrs old and 43lbs. Which means his 5pt he has is no longer good for the 5pt since it only ... [snip!] ... my son won't sit in a regular over the shoulder/lap belt. Is there other seats out there that are 5pt that hold more weight?"
Quoting Mom of 2 Monkeys:" Cameron is 43lbs and 3ft 9in. I've had him in a shoulder/lap belt with a booster, but he gets out of ... [snip!] ... kevin was gone with his (and the seats) and my MIL had a reg booster and i used that and he got out of it within seconds x_x"Did you make sure to pull the lap part as tight as possible then pull out all the slack to lock the rest of the belt? That's how Kieran was getting out,I hadn't pulled out enough to lock it and then make sure it went back in.