age and weight for booster seats
A â A booster seat is a firm cushion, with or without a backrest, that positions the lap and shoulder belt on. the child. Depending on the model, boosters fit children from 30-40 lbs. up to 80-125 lbs. Some manufacturers. require a minimum age of 3 or 4. The driver or parent may be cited for misuse if the child is under the. minimum age or weight specified on the label or if a booster is used with just a lap belt.