A 
booster  seat  (F-G) is a child restraint designed to 
improve  the  fit  of  the  vehicle's safety belt system. 
Some  booster  seats  have a shoulder belt positioner, 
harness. 
A 
booster  seat can also help a child to see out 
the  window. 
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Q: 
How 
do 
child 
restraints 
work? 
A: 
A child restraint system is any device designed for 
use in a motor vehicle to restrain, seat, or position 
children. A built-in child restraint system is a 
permanent part of the motor vehicle.  An  add-on 
child restraint system is a portable one, which 
is purchased by the vehicle's owner. 
For many years, add-on child restraints have 
used the adult belt system in the vehicle. 
To 
help 
reduce the chance of injury, the child also has to 
be secured within the restraint. The vehicle's 
belt system secures the add-on child restraint in the 
vehicle, and the add-on child restraint's harness 
system holds the child in place within the restraint. 
One system, the three-point harness, has straps that 
come down over each of the infant's shoulders and 
buckle together at the crotch. The five-point harness 
system has two shoulder straps, two hip straps and 
a 
crotch 
strap. 
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hip 
straps. 
A 
T-shaped shield has shoulder straps that 
are attached to a flat pad which rests low against the 
child's body. 
A 
shelf- or armrest-type shield has 
straps that are attached to a wide, shelf-like shield 
that 
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side. 
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