Product Categories Sliding DoorsPocket DoorsGlass DoorsFrench DoorsFrosted Glass DoorStationary Glass WindowsActive WindowsClosetsAir circulationSound InsulationSound InsulationSound Insulation Sound Insulation Made from a material called mineral wool.Helps in muffling the sounds transmitted between the rooms. Like any conventional wall, it will not block the noise completely.Free. Included in every wall.
