Wedges Acoustic Foam Panels, Measuring 12 X 12 X 2 Inches And 36 Packs, Provide ?Unique Design of Wedge Surface?This Acoustic Foam Panels is designed as unique triangle, which can not only absorb unnecessary sound, but also play a role in decorating the wall surface. Performs good in absorbing and eliminating unwanted echoes, flutter echoes, standing waves, reverb. You can harness to create the optimal environment for music recording or peaceful work. ?Easy to Expand?High density (25kg/cbm)polyurethane foam material are adopted for our sound panels, so they have extremely high resilience. Most of cases they can expand to full size and shape immediately even they are compressed sealed in package for a long time, sometimes it may take longer, a few hours to 1-3 days. ?Flame Retardant Material?Our acoustic foam panels are designed with professional-grade open cell polyurethane foam, passed the environmental protection and flame retardancy test of SGS, for safe and comfortable use. ?Widely Usage?GUERRI Acoistic soundproofing foam wedges can be used in any room that requires acoustic control or better music recording, ideal for recording studios, vocal rooms, control rooms, and ideal for home theaters, professional cinemas, concert halls, and more. ?Easy to Install?36 Pcs Covers 36 Square Feet. Each tile is 1 square foot of 2 inch thick acoustic panels. Using stickers or a special adhesive spray for acoustic foam, the panels are very easy to install on any surface.