Color: CHARCOAL; Multiple convoluted egg-crate wedges comes in tiles (2 convoluted egg-crate wedges = 1 tile). Dampen sound in printing rooms, warehouses, and noisy environments. Size: 1/2" x 12" x 12"; 12 pack =6 square feet. Good for studios, recording studios, vocal booths, and control rooms. convoluted foam absorbs 95% of high-frequency sounds. Staple, glue, or tack to walls and ceiling for optimum noise cancellation. Eliminates Standing Waves And Flutter Echoes; Reduces Unwanted Reflections; Reduces Unwanted Reflections. Product Care: Occasional Vacuuming of Dust