Johns Manville Formaldehyde-free insulation is made of 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. These kraft-faced fiberglass batts are for use in 2' x 6' exterior sidewalls, basement walls, garage walls, floors and ceilings/attics. It includes a built-in vapor retarder. Glass fiber will not settle rot, mildew or deteriorate. Pre-cut batts mean less cutting. This product helps save energy and includes tabs for easy stapling to wood framing. It offers good sound absorption and the inorganic glass fiber will not rot, mildew, or deteriorate. It is GREENGUARD® certified for superior indoor air quality.