Is it advisable to wear the seatbelt with this type of coat?

Is it advisable to wear the seatbelt with this type of coat?
A)Yes, it is more comfortable.
B)It makes no difference.
C)No, the seatbelt may lose effectiveness by not being fitted to the body.Correct
In order to be effective and fulfil its function, the seatbelt must:
- Be approved.
- Be properly anchored.
- Be properly adjusted and fitted to the body.
- Be correctly fastened.

If we are wearing a very bulky garment, the seatbelt will not be properly fitted to the body, so in the event of an impact the movement of our body will be greater, increasing the likelihood of the submarining effect — that is, the body sliding under the lap belt.