Johns Manville Formaldehyde-free insulation is made with proven fiberglass technology and consists of recycled and renewable content including a new organic plant-based binder that has no formaldehyde, acrylics, or dyes added. It offers the greatest thermal performance. It is for use in new or existing attic floor/ceiling applications. Kraft-facing serves as a vapor barrier to help manage moisture. Convenient pre-cut batts mean less cutting. It also Includes tabs for easy stapling to wood framing and good sound absorption. Inorganic glass fiber will not rot, mildew or deteriorate. GREENGUARD® certified for superior indoor air quality.