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【 Wedge Surface & Perfect Sound Absorption】Donner acoustic panels are designed for sound absorption and isolation. The wedge-shaped surface increases the contact area with sound waves to prevent sound from continuing to bounce and echo throughout the space by attenuating excess sound waves, thereby improving sound quality.
【High-quality Flame-retardant Material】Soundproof foam panels have high-density polyurethane material. It is made of flame-retardant and environmentally-friendly materials that passed the test of SGS. NOTE: Before using acoustic foam in an enclosed space, it is recommended that you ventilate to remove the odor of the flame retardant.
【Easy to Use & Install】Soundproof wall panels can be soaked in water for a while and then air-dried for 24-48 hours to restore the original shapes. Please make sure the wall is flat and free of foreign matter such as powder when you post. If your wall is rough, you can use acoustic foam spray adhesive. NOTE: Not included Stickers and acoustic foam spray adhesive.
【Multi-purpose】These sound-canceling foam can improve the acoustics in a room and make it a more valuable and useful space, whether for your studio or home theatre, entertainment room, church, office, or Gymnasiums.
【After-sale Service Guarantee】We provide a worry-free shopping experience service, if you have any questions, please feel free to contact our 24-hour customer service for help. We will give you a satisfactory solution.

Please allow up to 24 hours for the foam panels to fully expand to 2 inches after opening.