Ceilume Soniguard 24 Inch x 24 Inch Drop Ceiling Acoustic/Thermal Insulation (Case Of 24)Ceilume Soniguard acoustic insulation panels reduce noise transmission through suspended ceilings while enhancing thermal performance, creating quieter, more comfortable spaces without the irritation of traditional fiberglass. TR Soniguard is made from snow white, thermal bonded polyester so it is dust free, itch free, and fiberglass free so it will not lose body over time like fiberglass Easy to install Soniguard soundproofing drop ceiling insulation