Design Engineering 050111 Under Carpet Lite Sound Absorption and Insulation, 48" x 70" (23.3 sq. ft.) A multi-layered, lightweight, high-tech under-carpeting composite material offering maximum thermal insulation Extremely flexible and perfect for trucks, door liners, rear decks, head liners and more Insulates up to 85% of unwanted heat; creates a comfortable interior at any temperature Use alone, or as an added sound decoupler with Boom Mat vibration dampening material Superior noise absorption, preventing the rattles and squeaks to ensure a "like new" driving experience