No, it is actually not illegal to drive without a shirt right here in the United States. In actuality, there is no law stating anything about wearing a shirt is mandatory while driving. So you’re pretty much good to go, but there are other things you should be aware of. What? We’re referring to the safety, public decency, and things like that. Let’s talk about that a bit more.

No Shirt? No Law Against It
So, initially, it’s important to highlight that there is no such law in the United States that explicitly prohibits one from driving without a shirt. That simply means that yes, authorities would not come to a halt to your vehicle merely due to your lack of a shirt. The regulations focus primarily on those factors that have an impact on the safety of the road, for instance, exceeding the speed limit, operating a phone while driving, or driving in a dangerous manner, rather than the kind of clothes you are wearing.
Nevertheless, some cities or towns may impose their own laws regarding decency. That’s the thing you should be checking out or be aware of at least. Keep in mind that even if your car is considered your personal space, individuals outside can still have a look at you. And if the local regulations are stringent about public decency, you might receive a caution or a bit of trouble because of it.
The Public Decency Angle
This is the point where different rules can apply. In the majority of cities, a man driving without a shirt on will not be seen as an indecent exposure. However, in some very conservative places, it may cause people to raise their eyebrows, and you might even get a police warning.
But, for example, the regulations for women can be more severe. How exactly? Well, places such as Tennessee, Indiana, and Utah have ordinances that ban being topless in open areas. As your car windows expose you, a driving session without a shirt in those states might serve as an indirect violation of the rules. Hence, be cautious about your location all the time.
When It Might Cause Trouble
In case it is legal, you must be aware that frequently driving without a shirt can be the reason for unpleasant attention. How and why? Just to give you an idea, if you are stopped for another reason (for instance, speeding or a traffic issue), the officer might consider your behavior as “disorderly conduct” or that you caused a distraction. Incidents of this kind are very rare but still do exist.
Moreover, should you happen to be in a locality where the regulations relating to decency are more stringent, it might even serve as a motive for them to make you stop. Plain and simple! After a stop of that kind, they may look for other problems, such as open containers in the car or, perhaps, unpaid fines. Therefore, although it is not illegal, it is advisable not to attract attention.
The Safety Side of Things
Ok, it is not really illegal, but definitely not the safest choice. When a seatbelt is continually pressed against your skin, it can become quite uncomfortable during long drives, and, in some instances, friction burns may also be caused if there is a collision. Moreover, the heat from an airbag, bits of glass, or other things can injure your unprotected skin considerably more easily.
Besides, ponder over minor distractions, like for instance, just a little bit of cold drink falling on your chest or a sudden sting from the hot seat of your car could make you react with a quick and unexpected movement, and without a single doubt, that very moment of your reaction could be the reason for trouble on the road.