The R-21 Unfaced Fiberglass Insulation Batt is a high-quality insulation product ideal for attics and ceiling insulation. With each bag containing 7 pieces measuring 15.25″ x 93″, this insulation provides excellent coverage area of 68.94 sq ft. Made from fiberglass, it has an R-Value of 21 and is unfaced, allowing for easy installation on surfaces like plywood and wood. The product is designed to fit other sizes and is packaged as batt insulation, making it a convenient and effective choice for insulation needs.