EVA Sound Deadener Kit: The EVA Sound Deadener Kit is die cut for easy installation. Made from OE type, 1/16" thick Ethyl Vinyl Acetate (EVA) which is an asphalt based material used for sound dampening. Applies directly to the cab floor. Reduces road noise and cab harmonics to give you a quieter ride and also helps to insulate against heat and cold. To further insulate against heat and cold, use in combination with the Heat Shield Kits.Heat Shield Kit: Heat Shield Kit is die cut to match the EVA Sound Deadener Kits for easy installation. Consists of 1/4" thick, 24 ounce needle punched jute padding on one side which insulates against heat and cold. The other side has two layers of fiber reinforced aluminum foil reflecting up to 97% of radiant heat which helps to keep you warm in the winter and cool in the summer.