【Safe and Eco-Friendly】：Soundproofing panels for walls made of high-quality environmentally friendly polyurethane foam, formaldehyde-free, which has a great advantage in reducing and absorbing noise. These studio foams are durable and effective, no health hazards, safe to use. 【Fast Recovery】：1. After opening the vacuum packaging, 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 fan. 【Easy to Install】：Soundproofing panels are lightweight and can be installed on a variety of surfaces. 【2.5cm thick】：You may be worried that the thickness of the acoustic panel will affect its sound absorption. In fact, the effect of acoustic foam does not necessarily depend on its thickness. Although they are only 1 inch, our acoustic panels are composed of high-density materials. They effectively eliminate echoes and eliminate static electricity and flutter. [Wide Applications] Excellent acoustic treatment for many occasions, acoustic sound panels can not only reduce and absorb unwanted echoes, waves, reverberation and shaking echoes to make other sounds clearer, but also can be used as wall decoration. Easy to shape and cut to any size, change will not affect the performance. [Color]: Black [Material]: Polyurethane [Size]: 30 x 30 x 2.5cm [Package Contents]: 24 * Soundproofing Foam, Only the above package contents, other products are not included. [Note]: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm.