Then...so long as your car doesn't roll over or your steering column impale you...you are securely held in! Sorry to be graphic, but although I did add seatbelts to TR's previously, I decided against them on my current TR2. The chance of a front end collision or roll-over is better than 50/50, so I look at driving the TR as being closer to driving a motorcycle than a real car. Adding a roll bar would change that equation, making seat belts a solid positive addition!