Introduced in 1938, it has become the basis for all automotive climate control systems since. In 1936, Nash introduced the Bed-In-A-Car feature, a short-lived option which converted the interior of the car into a bedroom of sorts, doubtless responsible for countless teen pregnancies. In 1950, Nash invented seat belts. Yep, it took that long and the company which made them has gone out of business. Of great significance was the 1949 Airflyte. Wahlberg was one of the biggest early proponents of wind tunnel testing, and the Airflyte, along with the Chrysler Airflow, was one of the first cars to be genuinely aerodynamic.