These are amazing sound-absorbing felt panels that combine the best features of all other sound absorption materials combined without the downside! The most importantly, this sound-dampening wall art will give you great acoustics in your room and let you express your beauty and personality at the same time. The AFP panels have NRC rating 0.85 (85% noise reduction). The sound absorption material, that the panels are made of, does not have any volatile fibers to dislodge from the panel into the air and lodge right into your lungs like rockwool or glasswool does. It does not have any smell to it and it will not exude formaldehyde vapors like acoustic foam. So it is healthy for you. It is practically indestructible, and it will not disintegrate over time, like acoustic foam. They will serve you for many years to come. The material is also fire-resistant. It shrinks away from the fire and does not burn. These panels are the easiest to mount and require no special tools or skills. All you need is a pushpin! All in all, these decorative sound-dampening panels are a winning combination for anyone what wants to have great sound AND appearance of their recording studio.