R-38 Unfaced Fiberglass Sustainable Insulation® 12 in. x 16 in. x 48 in. (42.67 sq. ft.) (4 Per Master Pack) | R38U-1648-CT

Sustainable Insulation® brings you long-lasting comfort through thermal performance, reduced noise levels and exceeds California's strict Indoor Air Quality Requirements, all the while saving 12 times as much energy in its first year as the energy used to produce it. Plus, it will last for the life of the building as it won't settle, accumulate moisture or lose its R-value over time.

• Intended for use in either residential or commercial construction as thermal andacoustical insulation in ceilings, walls and floors
• Easy, cost-effective method to help conserve energy
• Provides excellent acoustical performance
• Easy to handle with a new softer touch without compromising its rigidity or recovery
• Resists mold and mildew and will not rot or deteriorate