This kit includes 16 square feet of 2-inch Pyramid foam in 24-inch by 24-inch panels. * Sonic Homework 2-inch Pyramid-shaped acoustic foam is best for increasing dispersion as well as absorbing unwanted sound, and is a premium-quality, yet cost-effective solution. * 2-inch Pyramid foam, covering 25-50 percent of the walls in your room, will help control unwanted peaks and dips in the frequency response, clean up flutter echo, and improve stereo imaging. * Sonic Homework Acoustic Foam has a density of 2.0lb per cubic foot, and is class-b flame-retardant * Sonic Homework kits are shipped with premium adhesive tabs for installation. Just peel the backing and hang "em up. The acoustic panels are shipped rolled and vacuum-packed for efficiency. Just open the bag and let the foam return to its original shape for up to 24 hours.