3D ACOUSTIC DESIGN: 2 inches foam provides moderate sound control on walls or ceilings. Perfect for individuals to reduce and unwanted echoes, waves, reverb and flutter echoes. Made with 100% Polyester Fiber, Retardant, it is both safe to in and Press, making it great for any location in the home or studio, it's safe for adults, kids, and pets! Great for spot treating sound on walls in your studio or office - For use in recording studios, control rooms, Offices home studios, home entertainment theaters, Home Offices. Easy to shape and cut to size, altering 't affect performance. The package is vacuum sealed for shipping. The first you see the foam is of deformation, pls do not worry about this. Just unpack the package in time and put in a ventilated place for 24-48 hours to normal shape. acoustic foam panels are an Perfect option for absorbing flutter echoes, standing waves and reverberation or unwanted medium-to-high frequencies of sound. Widely used or professional studio, home theater, control room, musical instrument studio, ktv, bar, vocal booth, , meeting room, podcast studio, etc. Colour:Black + Purple Material:Polyurethane Size:30x30x5cm Package Contents: 12* Acoustic Panels Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.