This product has flame retardant properties and will self-extinguish when it is away from the fire. Waterproof and moisture-proof. Excellent insulation performance Improve sound clarity, optimize sound quality, sound insulation, sound absorption and noise reduction. High density flame retardant, long-lasting durability. Decorative wall, reusable Color: Black Thickness: 1.1CM Area: 10 square meters Applicable scenes: drum room, piano room, bar, KTV, bedroom, hotel, opera house, kindergarten, theater, recording studio, conference room, concert hall, etc. Size: 1×10M Material: sponge