A seat belt prevents you from hitting on your dashboard or flying out through the windshield in the event of a crash.
So seat belts are made of elastic material to provide space during abrupt halts. The belt is designed to tighten and hold you in place in the event of a crash. They prevent you from hitting into the rapidly deploying airbags.
The right way to wear our seat belt is to place the shoulder belt across the chest and away from your neck. The lap belt should be below your stomach and across your hip.
People who are more likely to avoid wearing the seat belt are: teens, drunken drivers, pickup drivers, people in the rural areas, night drivers and drivers of commercial vehicles.