- Produced by environmentally polyurethane foam.In order to improve the opening steps and specific acoustic characteristics make it not only has the sound absorption characteristics effectively without any harm to human body - Mitigate slap and flutter echoes waves and reverb in all rooms. Maximum sound control can be achieved if combined with bass traps. - Ideal to soundproof: Recording Studios Vocal Booths Home Entertainment Theaters Rehearsal Studios Control rooms Concert Halls Churches Offices Man Caves Dog Kennels Power Generator Booths Movie Theaters Living Rooms Bedrooms & more. ✦Specifications: - Material: environmentally polyurethane foam - Color: black - Size:30x30cm（12 x12 ) - Thickness:5cm / 2 ✦Note： - The physical size of this product will be inaccurate because the express package will be compressed. If you want to quickly restore the original size you can soak it.