3D Acoustic Design: Ideal for individuals to reduce and absorb unwanted echoes, waves, reverb and echo flutter. Environmental protection: composed of environmentally friendly polyurethane at 50/lbs per cubic meter, acoustic panels not only have effective sound absorption properties, but also will not cause any harm to our body. Recover normal size quickly: open the package, put the foam panels in a ventilated place about 24-48 hours. Another method is to soak the foam in water for one minute and then wring the foam out of the water, air dry it, or use a hair dryer. You can also let them cook under the sun as well! Wide Application: Ideal for treating spot sound on walls in the studio or office-for use in recording studios, control rooms, home offices, theaters, home entertainment, home offices. Easy to shape and cut to size, the change will not affect the performance. High-quality materials: fireproof, you can breathe and press safely, making it great for any place in your home or studio, it is safe for adults, children, and also soon survival mode! Size: 30x30x5cm Material: Polyurethane Color: Blue + Black Package Content: 12 * Sound-Absorbing Foam Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture to be trout