Many vehicles do not have shoulder belts in one or more rear seating position.  Instead there is a lap-only belt.  Unfortunately you CANNOT use a booster seat with a lap-only belt, since it dos not protect a child well.  

Retrofitting the Vehicle Seat Belts
If your child needs to ride in a seating position equiped with just a lap-only belt, you may be able to purchase a shoulder belt retrofit kit.  A retrofit kit is the ideal solution when older kids/adults--who are too big for booster seats--must also ride in the rear seat, since shoulder belts provide much more protection for all passengers. Please note that shoulder belts CANNOT be added in the center of the back seat of any vehicle – these retrofit kits are only for the outboard (side) positions in the rear seat.

• List of vehicles for which retrofit kits are available, along with the part number and approximate cost of the retrofit kit

Replacing a Booster with a Bigger Car Seat
If you don't or can't retrofit your vehicle's back seat, here's a list of child restraints appropriate for lap-only belts and bigger children.

Convertible Seats (Rear and Forward Facing)

• Britax Marathon Classic and Marathon 70, Boulevard 70, Advocate 70, Roundabout 50 and Roundabout 55
• Diono Radian (all models)
• Maxi Cosi Pria 70
• Safety 1st Complete Air
• Recaro Proride

Combination Seats (Car Seats and Booster Seats--please note that if you have lap only belts in your vehicle, you CANNOT use these seats in their booster seat mode)

• Graco Nautilus
• Graco Argos 70
• Britax Frontier 85
• Safety 1st Go Hybrid

• Ride Safer Travel Vest
• Kid Y Harness with Ride Ryte Booster

PLEASE NOTE: Ride Ryte MUST be used with Kid Y harness if vehicle seat has lap-only belt. Additionally, Ride Ryte can be used as a backless booster only if vehicle seat comes up to top of child's ears. Depending on the maximum weight capacity of the tether anchor in your vehicle, you may need to install a heavy-duty tether anchor.

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