HighlightsEfficient Sound Absorption - Made with high-quality polyester fiber, our large-sized, high-density panels cover more area. With an NRC value of up to 1, they effectively absorb mid- to high-frequency noise, reduce echoes and reverberation, creating a quiet and comfortable environment for youSelf-Adhesive Design - The back features a self-adhesive design with 3M strong adhesive, ensuring it won't peel off easily. Installation requires no tools, making it quick and easy, significantly sa