AcoustaBlanket™ Black has a tough, durable, fire-resistant black nonwoven glass fabric top surface. This adds strength to the product during installation and use. The glass fibers resist bacterial and fungal growth, and will not rot or deteriorate. Composed of glass fibers firmly bonded together with a thermoset resin, overlaid with an extremely tough and durable abuse-resistant black composite facing with no printing on the top surface. The insulation is packaged in plastic bags to deliver a high volume of insulation.