A new concept for interior padding for passenger automobiles is introduced. This type of padding is composed of closed cells filled with air, each cell contains an orifice or other type of restrictor which allows the air to escape and provide energy dissipation. The results of this study show that, in side impacts, this type of padding substantially reduces the side impact injury risk measures proposed by the biomechanics community. This padding is inexpensive, light weight and returns to its original shape after minor impacts. According to the results of the present study this padding is approximately twice as effective as other types of paddings studied.