3D ACOUSTIC DESIGN: Our 2 inches soundproof wall panels provide moderate sound control on walls or ceilings. Perfect for individuals to reduce and absorb unwanted echoes, waves, reverb and flutter echoes. | ENVIRONMENTAL PROTECTION: Made up of environmentally friendly polyurethane sound foam padding at 50/lbs per cubic yard, the sound dampening panels not only have effective sound absorption characteristics, but also will not cause any harm to our body. | QUICKLY RECOVER TO NORMAL SIZE: Open the Vacuum package, put the sound absorbing panel in a ventilated place for about 24-48 hours. Another method is soaking the soundproof foam in water for one minute, then wring the acoustic panels out of the water, using air to dry it or using a hair dryer. You can also let them simmer under the sun as well! | WIDE USE: 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 won't affect performance. | AFTER SERVICE WARRANTY: Our US based customer service means that you can trust that if you're not satisfied for any reason, you can get a hassle-free refund or replacement.