12PCS 30*30*2.5cm Sound-absorbing Cotton Foam Soundproof Cotton Shed Wall Muffler Sponge

●Easy to shape and cut to size, changes will not affect performance.

●Suitable for use on walls in recording studios, offices, small and medium-sized rooms, classrooms, theater rooms, etc.

●High-density sound absorption to reduce harmful noise -The panel helps to reduce reverberation, vibration, and undesirable sound reflections.

●Square sound-absorbing sponge with beautiful appearance and good acoustic properties. Due to its square shape, there is no diffusion and the effect is very good.

●Flame retardant, self-extinguishing after 3 seconds on open flame, reducing safety risks. But it should be known that burning on an open flame for a long time will destroy the flame retardancy and make the sound insulation cotton burn.