Ferrari 458 Italia Owner's Manual page 51

Warning
Seat belts must be worn at all times and must be properly
fastened and adjusted!
Correct use of the seat belts can significantly reduce the risk
and severity of injury if an accident occurs or if the vehicle
overturns.
Warning
For an effective restraining action, the seat belt must be fastened
correctly with the seat backrest in the upright position.
The seat belt is fastened correctly when the upper part of the
belt crosses the centre of the shoulder (not the neck) and the
abdominal section is fitted over the hips (not the abdomen).
Make sure that the belt is not twisted and that it passes closely
over your body; if not, in the event of a head-on collision, it may
move and cause injury to the abdomen.
Avoid wearing bulky clothing that may interfere with the proper
operation of the seat belts.
Warning
Each seat belt has been designed to protect only one occupant.
If more than one person uses the same seat belt, the risk of
injury in the event of an accident is increased.
Do not sit babies, small children or other persons on your lap.
If there is a collision, the weight of an adult may cause the
child to be crushed by the seat belt causing severe or even fatal
injuries.
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Safety
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