Non-combustible stone wool insulation, water resistant, fire resistant and easily cut. Excellent sound absorbency. Chemically inert, moisture resistant, does not rot nor promote mildew, fungi or bacteria. CFC and HCFC-free product. Made from natural and recycled materials. 3 X 15 1/4 X 47". Pack of 12 batts.Covers up to 59.7 sq.ft. Stone wool.