Two types of high-back belt-positioning booster seats are available. This type of seat “boosts” your child up so the vehicle seat belt fits better.
One is used only with a lap/shoulder belt and provides head and neck support for your child if your vehicle seat back does not have a head restraint.
The other converts from a forward-facing toddler seat to a booster seat and comes equipped with a harness. This type can be used as a forward-facing toddler seat when your child is age one to about age four and at least 20 to about 40 pounds. When your child outgrows the toddler seat, remove the harness to use the seat as a booster seat with the vehicle’s lap/shoulder belt. When using the harness, the seats are attached using the vehicle seat belt system and a top tether anchor, if the vehicle has one, or attached with the LATCH system, (for Lower Anchors and Tethers for Children).
NO-BACK BELT-POSITIONING BOOSTER SEAT
These seats are used with a lap/shoulder belt.
They are for use in vehicles with built-in head restraints.