This Rockwool Comfortbatt R-23 insulation (Model# RXC85523) is made from stone wool and provides excellent thermal and sound dampening performance. Each batt measures 23"W x 5.5" thick x 47"L, and this listing includes 5 pieces totaling approximately 37.5 sq. ft. of coverage. Unfaced design is suitable for interior walls, floors, and ceilings. Fire-resistant and moisture-repellent, stone wool insulation is a premium choice for energy efficiency. Like new in original packaging.