The PMS-350-BLK is a component from LMB/Heeger, a leading international manufacturer of premium-quality acoustic and mechanical fabrics. Typically used in the aeronautical, transportation, and acoustic noise reduction industries, it is a multi-purpose composite fabric with a noise reduction rating (NRR) of 9dB, which is above the industry standard of 8dB. PMS-350-BLK features a combination of vinyl-coated polyester or polypropylene scrim, a unidirectional black glass, a zero shrink back, and natural bentonite binder. This makes it especially suitable for various acoustic applications and sound dampening projects. In addition, the fabric is flame retardant and has a 10-year warranty against decay when properly installed.