Owner's Manual
Page 221
... should be used until they are big enough for the whole trip? 221 2009 F-250/350/450/550 (f23) Owners Guide, 3rd Printing USA (fus)... your child restraint manufacturer). Moving the child closer (a few centimeters or inches) to use approved booster seats until they reach a height of at least 4 feet 9 inches (1.45 meters) tall (around age eight to age twelve and between ...the hips and the knees bend comfortably at the edge of the cushion, while minimizing slouching. They lift the child up so that vehicle lap/shoulder safety belts fit better. Seating and Safety Restraints Booster seats...
... should be used until they are big enough for the whole trip? 221 2009 F-250/350/450/550 (f23) Owners Guide, 3rd Printing USA (fus)... your child restraint manufacturer). Moving the child closer (a few centimeters or inches) to use approved booster seats until they reach a height of at least 4 feet 9 inches (1.45 meters) tall (around age eight to age twelve and between ...the hips and the knees bend comfortably at the edge of the cushion, while minimizing slouching. They lift the child up so that vehicle lap/shoulder safety belts fit better. Seating and Safety Restraints Booster seats...