1934-1937 DeSoto Airflow UltraMat Sound Deadening insulation Deadener Heat Floor Kit , Airflow III, Airflow1934 1937 DeSoto Airflow UltraMat Sound Deadening insulation Deadener Heat Floor Kit The engineering team at Zirgo Sound Labs has specifically designed this kit for your 1934 1937 DeSoto Airflow Inner Floor. This kit includes all the correct material needed to reduce echoes, drones and unwanted rattles resulting in a quieter ride. The exclusive advance design of the open closed cell foam wall helps remove unwanted sounds by absorbing background noise