<div>Fibreglass insulation, 5.5 x 23 x 47 inches. Covers up to 75.08 square feet. Thermal resistance of R22. Insulating wool is a flexible material made of fibreglass without formaldehyde. It is used for the insulation of walls and attics and improves energy and acoustic efficiency. It has resistance to fire and mildew.</div><div><br></div>