[High quality Materials]Our sound absorbing foam panels crafted from fire-retardant and eco-Friendly material, it is safe to use in small and medium-sized rooms. High quality panels for better sound absorption, Reduce waves, reverb and flutter echoes in smaller to medium sized rooms. [Noise Absorbing]For professional acoustic control sound absorption and reverberation reduction. This sound foam by attenuating excess sound waves to obtain better recording effects, the Egg of - increases the contact area with sound waves, and the sound absorption effect is other shapes of surfaces to minimize interference, increases increasing sound clarity. [How To Recover The Normal Size Of The Acoustic Foam]1. After opening the Vacuum package, place the Acoustic Foam in a ventilated place for 12-24 hours; 2. Or soak the foam in water for 1 minute, wring it dry, then air dry or use a blower dry. [Installation Method]It is recommended to stick the tape to the four corners and the center of the back of