I heavily researched backless booster seats to use in our nanny’s car when all three of my kids are riding, as no high-back will fit in the middle with two car seats on the side.

Highback booster seats, also sometimes simply referred to as booster seats with a high back, have a structure that’s more similar to a forward-facing car seat.

UK law states that children must use a child car seat until they're 12 years old or 135cm/4ft 5in tall, whichever comes first. From around the age of four, this usually means either a backless booster ...

There are backless booster seats and high-back booster seats. ... The seat may be too narrow for larger children. The seat is relatively heavy at 10 pounds.

According to the National Highway Traffic Safety Administration, most kids should use either a high-back or a backless booster seat until they are between 8 and 12 years old.

Which high-end booster seat is best? As your child grows, the type of booster seat they need changes. As infants, they start off in a rear-facing car seat and transition to a forward-facing seat ...