These fiberglass acoustic panels are designed to absorb mid-to-high frequency noise and help reduce echo and reverberation in studios, offices, home theaters, meeting rooms, and other interior spaces. Each panel features a self-adhesive 3M backing for quick installation without tools or drilling. The panels are made from 100% white fiberglass liner and are described as odor-free and compliant with green E0 standards. This 4-piece set offers a simple way to improve sound control while maintaining a clean, neutral look.