[REDUCE NOISE]: Our 3D acoustically designed 2-inch sound absorbing panel/sound proofing padding for wall helps break up sound waves providing the ideal level of moderate sound control on walls or ceilings. [REDUCE REVERB]: At 50/lbs per cubic yard, these sound dampening panels effectively absorb unwanted flutter echoes. Made up of non-toxic environmentally friendly polyurethane sound proof foam at 50/lbs per cubic yard. [EXPANDS QUICKLY]: Our sound proof foam panels come compressed in a vacuum package and quickly recover to normal size, either by placing in a well ventilated place for about 24-48 hours or soaking the sound foam in water for one minute then wringing the water out and using a hair dryer or letting it air/sun dry. [PLACE ANYWHERE]: The soundproof wall panels are great for spot treating sound in your studio or office - For use in recording studios, control rooms, Offices home studios, home entertainment theaters, Home Offices. Easy to shape and cut to size, altering wont affect performance. [AFTER SERVICE WARRANTY]: If you have any problems can contact us.