Improve the sound quality of music in your vehicle when you use this Dynamat Xtreme door sound dampening kit. This kit consists of four sheets that each measure 12 inches wide by 36 inches long. A total of 12 square feet is included, which is enough to completely cover the surface of most vehicle doors. The material installs quickly, and no heat is required. With an exterior aluminum skin, the material also reflects radiant energy for enhanced interior cabin comfort.