This is a polyester fiber felt soundproofing board, which are made of good quality material, durable for long lasting use. Sound absorbing material reduces the reflection of the sound produced in the room and attenuates the sound.Suitable for home, school, gym, church, restaurant, office, etc. Features - Color: Black. - Material: Polyester fiber. - Size: 34.00X34.00X1.00cm/13.36X13.36X0.39in - Made of good polyester fiber material, they have door acoustic absorbing effects and durable for long-lasting use. - Theyutilize the insulation and anti-shock properties of the sound absorbing material, and it can be used in a wide range of applications such as digital equipment. - Great sound insulation accessory to reduce noise and echo in recording studios, control rooms, offices, home studios and home entertainment theaters. - You can install and remove them from your wall easily, very simple for you to use. - Suitable for home, school, gym, church, restaurant, office, very practical and multifunctional.