Features: Made of selected polyester material, & breathable & environment-friendly & , to human body. Due to 215kg/m2 high density material, it can provide great sound absorption performance and accommodate the to high frequency ranges, reducing noise and helping produce professional and high-quality recordings. The size of each panel is 30*30*1cm, which can be easily cut and DIY to meet your requirements. Just install them wherever you like. Come with 12 pieces and there are four optional colors for meeting different requirements. You can collocate free due to the aesthetic appearance. A great solution for reducing and absorbing unnecessary noise, echo, and reverberation in a office, bedroom, recording studio, broadcast booth, gaming room or podcast room, etc. Specifications: Quantity: 12Pcs Material: Polyester Color: Red / Black / Blue / Grey (Optional) Item Size: Approx. 30*30*1cm / 11.81*11.81*0.39in Package Size: Approx. 31*31*11cm / 12.2*12.2*4.33in Package Weight: Approx. 1200g / 42.33oz Packing List: 12 * Acoustic Panel