Sound Control Mat reduces noise, vibration and heat created from the engine, road and structure of your vehicle. Can be applied to any interior surface area; cover as little as 25% of an area for a noticeable reduction. Each 2mm thick sheet consists of butyl rubber with a top layer of heat resistant aluminum that is easy to cut and conform to contoured surfaces, just peel and stick. Available in silver and black, each sheet measures 21" x 29".3-in-1 Sound Control Mat combines the vibration absorption and heat resistant capabilities of the 2mm thick Sound Control Mat with an additional 5mm thick layer of foam for more efficient sound deadening. This makes it our most effective product for eliminating road noise and vibrations in your truck. Each sheet is 7mm thick and measures 19" x 31".