To drive safely, it is important to wear **appropriate clothing**. A bulky coat can interfere with the **effectiveness of the seat belt**. This is because the belt must fit properly to the body to function optimally in the event of an accident. If the coat is very thick, the belt will not fit well, which could reduce its ability to protect you.

Additionally, it is recommended to wear comfortable clothing while driving to facilitate movement and avoid restrictions. In winter, it is advisable to remove the coat before starting to drive to ensure that the seat belt fits correctly and you can move freely.

Therefore, although it may seem that a bulky coat offers more protection, it can actually compromise safety by reducing the effectiveness of the seat belt.