OWENS CORNING R-21 Unfaced Batt Insulation measures 16 in. x 96 in. to fit standard wall cavities efficiently. Its unfaced design allows flexible installation with any vapor barrier system, providing excellent thermal resistance with an R-value of 21. Ideal for contractors seeking reliable, high-performance insulation to improve energy efficiency and comfort in residential and commercial projects. Durable and easy to handle, it helps meet building codes and enhance overall structure insulation.