Effectively Reduce Noise & Improve Sound Quality: 25 kg/m³ high-density acoustic foam panels; fine open-pore foam design effectively absorbs and reduces echo and background noise; significantly improving the clarity and quality of audio output,Flame-Retardant: Our sound absorbing foam passed the US flame retardant test and received flame retardant product certification; This soundproof wall panels is non-toxic and odorless; and is safe and reliable,Fast Rebound: Made of 100% ultra-high rebound polyurethane raw material; If your foam panels do not return to their shape effectively; please soak them in hot/ boiling water (80℃-100℃) for 10-30 seconds; and then dry them with a hairdryer or drye,Easy to Install: The sound panels is light and flexible; suitable for various wall surfaces; and comes with easy-to-install glue; making the installation process quick and easy,Wide Application: Suitable for recording studios, interview rooms, conference rooms, podcast rooms, music rooms and game rooms, providing you with a high-quality acoustic environment