Duck Brand Multipurpose Insulation helps save energy by filling and sealing gaps. The recycled cotton insulation contains no fiberglass and won"t itch when applying product. From air conditioners to reducing notice, this product is great for many different applications where insulation is needed. This multipurpose insulation has a R- Value of 6.7 and is flame retardant with a Class A fire rating. Each roll is 48-Inch long, 16-Inch wide and 1.8-Inch thick.