The seat belt should always be worn by running it over the front of your body and over your arms. Only in this way does it provide the necessary security.
To fasten the seat belt you must pull it and, after confirming that the belt is not twisted, insert it into the buckle until you hear or feel the "click". Pull the shoulder strap portion of the buckle slightly away from your body, and then release it. This will eliminate any slack in the belt.
If there is slack in the seat belt between your body and the belt you can move significantly in the event of a collision. Even if you have your seat belt fastened, your body can still impact other objects on the vehicle, possibly resulting in serious injury.
