Ford F-150 Owner's Manual page 33

If your backless booster seat has a
removable shield, remove the shield. If a
vehicle seating position has a low seat
back or no head restraint, a backless
booster seat may place your child's head
(as measured at the tops of the ears)
above the top of the seat. In this case,
move the backless booster to another
seating position with a higher seat back or
head restraint and lap and shoulder belts,
or consider using a high back booster seat.
E70710
E142596
F-150 (TFC) Canada/United States of America, enUSA, Edition date: 201607, Second Printing
Child Safety
• High back booster seats
If, with a backless booster seat, you cannot
find a seating position that adequately
supports your child's head, a high back
booster seat would be a better choice.
Children and booster seats vary in size and
shape. Choose a booster that keeps the
lap belt low and snug across the hips,
never up across the stomach, and lets you
adjust the shoulder belt to cross the chest
and rest snugly near the center of the
shoulder. The following drawings compare
the ideal fit (center) to a shoulder belt
uncomfortably close to the neck and a
shoulder belt that could slip off the
shoulder. The drawings also show how the
lap belt should be low and snug across the
child's hips.
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