HushMat 10110 Ultra Black Foil Speaker Kit with Damping Pad - 4 Piece Super easy to install! Reduces road noise & vibration - low frequency noise from 0 to 1,000 Hz Reduce heat Reduces thermal transfer by over 40% Stay warmer in the winter & cooler in the summer Insulates from -30 degrees up to 550+ degrees Fahrenheit Light weight & super flexible less than 1/8 thick and 0.47 pounds per square foot Eliminates road noise Features Ultra vibration damping pad to stop vibration Engineered to fit the OEM specifications Reduces heat up to 40 percent Withstands temperature from minus 30 degree Fahrenheit to 400 degree Fahrenheit