Johns Manville's R-15 Unfaced Formaldehyde-Free Fiberglass Wall Insulation Batts are not only effective at maintaining consistent indoor temperatures, but they also contribute to noise reduction by minimizing sound transfer between rooms. Free of formaldehyde, this product offers a safer, healthier indoor environment. The 3-1/2-inch thickness ensures a snug fit in wall spaces, enhancing the overall comfort of your living or working space. Whether you're looking to improve your homes energy efficiency or soundproof a room, Johns Manville's R-15 Unfaced Insulation Batts provide a durable, long-lasting solution.