R-40 FIBERGLAS® Insulation. 24" x 48" x 11" and covers 48 sq.ft. For attics. Friction-fit batts are easy to install and offer outstanding thermal performance providing savings on heating and cooling costs. Non combustible. Made in Canada with a minimum 73% recycled glass content, SCS Certified, GREENGUARD Gold certified for indoor air quality and validated to be formaldehyde free.